Papers past, climate future

By Robert McLachlan

Next Monday, 22 August 2022, is the 21st birthday of a terrific project of the New Zealand National Library, Papers Past, a sweeping attempt to digitise vast range of old newspapers, books and magazines. A series of public events and online panel discussions marks the occasion.

Thanks to Papers Past, the now-famous “Coal Consumption Affecting Climate” article, from the Rodney and Otamatea Times of 14 August 1912, was rediscovered and became known around the world. (Its 110th anniversary has been noted by James Shaw and Toby Manhire, among others.)

Here’s another early climate change article, from the Christchurch Press of 19 December 1969:

Scientists issued a warning to the human race yesterday that that pollution could change the temperature of the oceans and alter the climate of the earth.

Mr E. D. Goldberg, an oceanography chemist, told a meeting of the American Geophysical Union that man was changing his environment almost as much as nature itself.

Mr Goldberg, of the Scripps Institution of Oceanography, La Jolla, California, said that effects of pollution were not known but they posed some “haunting” questions. “Will it alter the ocean as a resource?” he asked. “Will we lose the ocean? There are some complex ecological questions.”

Mr Goldberg urged the establishment of monitoring programmes to measure the increasing loads of such chemicals as lead, mercury, pesticides and petroleum. Mr J. O. Fletcher, a physical scientist for the Rand Corporation in Santa Monica, California, said that man had “only a few decades to solve the problem” of global warming caused by pollution.

“Very substantial changes have taken place during our lifetime,” Mr Fletcher said. “There is good evidence that man’s influence is small compared with natural ones. However, within another generation, man will become important, the carbon dioxide pollution apparently being the most important.” Carbon dioxide, causing one-third to one-half of the warming in the first part of the twentieth century, has had a much greater impact than particulate matter (dust, dirt and smoke), Mr Fletcher said. Global warming could cause further melting of the earth’s ice caps and affect its climate, Mr William Kellogg of the National Centre for Atmospheric Research, Boulder, Colorado, said that the situation points up a problem of educating earthlings that “man has got to change his ways.”

Messrs Kellogg and Fletcher agreed that population control would be one of the stickiest problems.

“Sooner or later, it (global climate) will have to become a manageable problem,” Mr Fletcher said. Documenting his assertions of ocean pollution, Mr Goldberg said that 250,000 tons of lead drifted annually into the oceans of the northern hemisphere. “This compares with the natural leaching in the hemisphere of about 150,000 tons a year,” he said, “and we’ve just been using lead the last 15 years as an anti-knock agent in petrol.”

Mr Goldberg said that a million tons of petroleum are introduced to the oceans each year by ships. “The result has already been felt,” he said. “There have been cases of fish tasting of petroleum.” But the oceanographer called pesticides such as D.D.T. “perhaps even more insidious.” He noted that mackerel had been taken off the market in Los Angeles because they contained a higher content of D.D.T. than was permitted by law.

The article holds up pretty well. Within a generation, carbon dioxide did become important, dominating natural factors.

The context of the article is interesting, too. The Vietnam war, the cold war, terrorism, the Middle East, and attempts by the UN to solve world problems (including a treaty on the seabed) dominate the world news. And flying saucers.

This was just a few years before the first oil shock of 1973 which is now seen as a turning point in the post-war era. Some countries responded with a shift in their long-term energy strategies: Britain moved from coal to North Sea gas, France to nuclear, Sweden to nuclear and biomass. Emissions in these countries are now less than half their 1970s peaks.

But we’ve also learned that in most cases, turning off the tap on a cheap energy source is not that easy. Attempts to do so will be met with all kinds of resistance.

Now we are again seeing an energy crisis, with the main trigger being the war in Ukraine, at the very time that we need to accelerate the move off fossil fuels, while simultaneously coping with impacts on food prices due to the combined effects of the war with drought in Europe.

In fifty years time, will 2022 look like a turning point?

Nation-building or nature-destroying? Why it’s time NZ faced up to the environmental damage of its colonial past

By Olli Hellmann, University of Waikato

The ways in which New Zealand remembers European colonisation have changed markedly in recent years. Critics have been chipping away at the public image of Captain James Cook, the New Zealand Wars have been included in the new compulsory history curriculum, and streets honouring colonial figures have been renamed.

However, while New Zealand is slowly recognising the historical injustices suffered by Māori, the same reappraisal hasn’t extended to the natural environment. The dramatic transformation of “wild untamed nature” into “productive land” by European settlers in the 1800s continues to be widely celebrated as a testament to Kiwi ingenuity and hard work.

My soon-to-be published research, based on a survey of 1,100 people, suggests this narrative could be partly responsible for New Zealanders’ apparent complacency on climate change compared to other countries.

Essentially, it appears those who refuse the “taming of nature” narrative – and instead recognise the 19th century as a period of environmental destruction – are more likely to have what psychologists call an “environmental self-identity”.

The findings further suggest that changing individual behaviour as a strategy to tackle environmental threats (as recommended in the Climate Commission’s 2021 report) might mean addressing how we communicate the history of environmental change in schools, museums and at public heritage sites.

In particular, this might mean framing what happened in the 1800s as more about loss than achievement.

‘Taming nature’: clearing bush in the Coromandel, late 19th century. Unknown photographer, via Wikimedia Commons

A story of progress or decline?

Prior to human settlement, Aotearoa New Zealand had been isolated from other landmasses for around 60 million years. The result was the evolution of a unique ecosystem that was highly vulnerable to disturbances.

Māori arrived around 1300 and brought with them invasive mammals: the Polynesian dog (kurī) and the Pacific rat (kiore). Through widespread burning, Māori – either intentionally or accidentally – destroyed large areas of forest in drier eastern parts of Te Wai Pounamu (South Island) and Te Ika a Māui (North Island).

Moreover, archaeological research suggests a number of bird species were hunted to extinction, including moa and adzebill.

European settlers began arriving in large numbers after the signing of the Treaty of Waitangi in 1840. On the back of (often dubious) purchase deals, the introduction of private property laws and forceful confiscation, vast areas of Māori land ended up in European hands.

What followed was a classic example of what’s been called “ecological imperialism”. Much of the remaining forest was transformed into grassland for sheep and cattle. Acclimatisation societies introduced other familiar animals and plants from Europe.

Purposefully and accidentally introduced species – such as stoats and ship rats – wreaked havoc on the native wildlife. Within a few decades of European colonisation, several birds went extinct, including the huia, the piopio and the laughing owl. European capitalism also had a devastating impact on seal and whale populations.

Veneration of the pioneers: a mural by artist Mandy Patmore depicts bushmen at their camp with the Waitakere Ranges in the background. Auckland Libraries Heritage Collections, CC BY-NC

A “usable past”

Despite the long history of environmental change, it is the transformation of the landscape in the 1800s that occupies the most prominent place in New Zealand’s collective memory, relative to other periods. The reason is fairly simple: the era provides what memory scholars call a “usable past” – usable because it helps to construct a distinctive New Zealand identity in the present.

Similar to historical events such as the signing of the Treaty of Waitangi and the Gallipoli campaign, the “taming of nature” in the 1800s is remembered as an experience that forged the nation. European settlers – in particular the bushmen who cleared the forest to make way for farms and pastures – are portrayed as the prototypical New Zealander.

Their hard work and “number eight wire” ingenuity still define popular versions of the national character today. And media continue to portray the countryside as the “real” New Zealand, including in advertisements and television shows.

It should be stressed this is largely a narrative of the European settler majority. For Māori communities, the transformation of the landscape under European colonialism is more a story of decline than progress. Māori memories of environmental change in the 1800s are intertwined with memories of colonial violence and dispossession.

Most New Zealand farms were once dense bush that was cleared by burning and logging. Getty Images

Memory shapes environmental attitudes

My survey sought to explore whether different interpretations of New Zealand’s environmental history shape people’s attitudes towards nature, and whether those interpretations make it more or less likely that people see themselves as someone who acts in an “environmentally friendly” way – the environmental self-identity mentioned earlier.

A key finding is that those respondents who pinpointed the 1800s – rather than Māori settlement or the second half of the 20th century – as the most destructive period of environmental change were most likely to describe themselves as environmentally friendly.

For Māori respondents, this is perhaps not entirely surprising. An awareness of injustices suffered in the 1800s tends to go hand in hand with a strong spiritual connection with the land and a sense of responsibility towards nature.

More significant is that European New Zealanders who recognise the environmentally destructive role of 19th-century settlers were more likely to identify themselves as environmentally friendly than those who point to other periods in history.

It appears those European New Zealanders who acknowledge the environmental destruction caused by their ancestors feel a greater responsibility to fix these mistakes in the present.

How we remember the past matters

To encourage more pro-environmental behaviours, the survey results suggest New Zealand needs to move away from narratives that glorify environmental change of the early colonial era as an expression of national character.

Such interpretations of history reinforce ideas that get in the way of achieving a sustainable future. They promote a strongly utilitarian perspective on our relationship with the environment. Nature is reduced to a commodity to be exploited in the pursuit of human interests.

New Zealand has taken the first steps to work through its violent political past, but this process also needs to include colonialism’s devastating effects on the environment.

Rather than remembering the transformation of the landscape by European settlers as a nation-defining moment, public history should encourage an examination of human complicity in the destruction of nature. Hopefully, this can help transform such understanding into present-day environmental action.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

The Government’s new renewable energy target is a major development

By Robert McLachlan

The Emissions Reduction Plan, released last month, is a major milestone in the journey which began five years ago when environmental groups called for a Zero Carbon Act.

One of its provisions is to establish a renewable energy target. This refers to all energy, not just electricity. Addressing climate change means stopping burning fossil fuels so that eventually, all of society’s energy needs are met with renewables.

In 2020, 28% of New Zealand’s energy was renewable. That’s better than the world average of 11%, but well behind the renewable energy superpowers of Norway, Sweden, and Iceland, which are all over 70%.

Alarmingly, we have not made any progress on this measure since 1990.

Adopting a renewable energy target was a key recommendation of the Climate Change Commission. They called for a target of 50% renewable energy by 2035, and this has now been adopted.

A renewable energy target has long been a central part of Europe’s climate change response. Their first target (12%) was adopted as long ago as 1997. Their next target (20% by 2020) was adopted in 2009, and was achieved.

Their 2030 target was initially set at 32% in 2018, but was raised to 40% in the Green New Deal, and then, in May – in response to Russia’s invasion of Ukraine – increased further to 45%.

In raw numbers, the European target is more ambitious than New Zealand’s, but Europe also has form in this area, while we are (almost) starting from scratch.

Why do we need an energy strategy, when we already have carbon budgets and measures to meet them, like the Emissions Trading Scheme? The Commission wrote that developing a national energy strategy would help to ensure different aspects of the energy system in Aotearoa are considered in a coherent way: not just emissions reductions but reliability, affordability, infrastructure, supply chains, workforce needs, and fairness.

To these we could add that an energy target provides a backstop to cutting emissions. The carbon budgets measure net emissions from all gases. Overperforming in one area, say by planting trees or cutting biomethane, would risk underperforming on others, especially fossil fuels. But a steady phase-out of fossil fuels for energy is an absolute requirement for a safe future.

(You’d think that message would have sunk in by now. But alarming numbers of people are still buying brand new cars powered entirely by fossil fuels.)

When you’re driving a one-tonne car, most of the energy from the combusted fossil fuels goes towards propelling the heavy vehicle itself forward, rather than its passengers. The steel, plastics and glass of the car body also produce lots of greenhouse pollution in manufacturing. For that reason, the smaller the vehicle, the lower the lifetime carbon footprint. Using an ebike for short journeys is much greener than a traditional car, and even beats an EV.

A target also draws attention to our total energy consumption. We get through a lot, about 40% more per capita than the EU.

Strategies such as low-energy housing located where people can walk where they need (the “15-minute city”) will reduce energy consumption as we move off fossil fuels. The target in the Emissions Reduction Plan to reduce driving 20% by 2035 – a massive energy saver – is a landmark decision in an area which has previously been open slather.

Conversely, airport and road expansions that increase energy use and fossil fuel use are questionable.

Globally, it is very difficult to meet the 1.5C or even the 2C target without substantial reductions in energy use – an approach that has been called “green growth for the poor, degrowth for the rich.”

An energy strategy will also focus attention on what energy does for us, both for the economy and for our wellbeing. A wellbeing approach would emphasise those things that are essential for a decent quality of life, including healthcare, work, education, environment, and civic and family life.

It would prompt an examination of the distribution of energy consumption, and of what level is excessive in the context of a global crisis.

Notably, there were initiatives in the budget for low- and medium-income people such as cheaper public transport and grants to dispose of old cars.

But most household emissions come from high-income households. They have high emissions and the means to reduce them. But with no one being compelled to do anything, we must rely instead on a combination of incentives and regulations from the government, whose long-term impact is hard to foresee.

Two-thirds of New Zealand’s fossil energy comes from oil. (One quarter is gas, one twelfth coal.)

The oil alone was costing us $7 billion a year even before the war in Europe – funded by oil and gas sales – pushed up prices. That starts to make the Climate Emergency Response Fund’s $1b a year look like a small change. The outsized share of oil once again points to the need for a revolution in transport.

This article appeared first in Stuff. Read the original article.

Native forests cannot realistically compensate for flying

By Paul Callister

Submissions have now closed on a potential law change that would shift the emphasis from fast growing pine and other exotic forests to permanent native forests to absorb our emissions. These are complex debates involving forest ecology, economics, as well as ideology. The decision will have a major impact on long-term land use, especially with regard to marginal farmland. This, in turn, will affect farmer and Māori landowner decisions on how to maximise returns from their land. 

Underpinning these debates is a critical issue. How realistic is it to use native forests to absorb our emissions?

Focussing on transport alone, according to the Climate Change Commission, our domestic transport related emissions need to be reduced by 13 percent by 2030, just eight years away; and by 41 percent by 2035 (compared to 2019). The year 2050 is a date often quoted for reaching ‘net zero’. 

Some claim these are conservative targets. It should also be noted that these targets currently ignore international aviation and shipping emissions. 

Trees that Count promote the Tāne’s Tree Trust National Carbon Calculator. This allows individuals and organisations to plug in the amount of emissions needed to be absorbed. The calculator then works out how many trees and shrubs need to be planted and how long it will take to fully absorb the carbon. This assumes, of course, all the trees are well looked after and will thrive long term. This is not always the case.

With regard to natives, it is clear that large podocarps such as totara, kahikatea and kauri are the heavy lifters in terms of carbon absorption. But, trees such as kahikatea are best suited for damp, low-lying areas of land, not steep, thin soiled, hillsides. Unlike pines and some other exotics, these podocarps are generally hard to establish and, at least initially, grow slowly.

Case study: a working holiday abroad

So, here is a simple example based on native planting. A 20-year-old decides to take a return economy flight to London from Wellington. 

First, they use Air New Zealand’s calculator. The total distance flown is 37,662 km. Air New Zealand estimates this generates 2.772 tonnes of CO2. The cost to offset this CO2 is a mere $67.42.

But, being somewhat sceptical of relying on an airline calculator, they then try the Toitū Envirocare travel calculator. 

This calculator suggests they will generate 7.184 tonnes of CO2, significantly more than Air New Zealand’s estimate. As a further check the atmosfair calculator was used. This asks for aircraft type and requires a stop over as it calculates a direct flight is not possible. Using Singapore as the stopover, this calculator puts the emissions at 11.563 tonnes. This is much higher again, partly through how radiative forcing effects are calculated. But for the purposes of this exercise let us use the 7.184 tonnes from the Toitū Envirocare calculator.

Using the Tāne’s Trust calculator, focussing only on trees and not shrubs, shows only 16 trees need to be planted. This looks hopeful. If the trees and suitable land are available and well cared for, it might be possible to get these in the ground for about $10 each. So the carbon can be absorbed at the relatively low cost of $160. Still, this is more than double the Air New Zealand offset cost.

 But, on closer observation, this calculator shows very little carbon is absorbed in the early years. In fact, it will take 50 years for the carbon from this one trip to be taken up by the trees. The 20-year-old will be 70 by the time the trip is fully ‘paid’ for in carbon terms. 

Thinking that this is not good enough, the young carbon-conscious traveller decides they want all their carbon absorbed by 2030, that is in eight years’ time. The calculator does not like this short time frame and issues a warning. Nevertheless, it provides an estimate of how many trees are needed for offsetting in this time frame. Suddenly, the number jumps to 1,936. At the $10 cost per tree planted, offsetting just one return flight for one individual would cost $19,360. 

So let us push the time frame out once again; carbon neutral by 2050? This requires 58 trees to be planted at a heavy cost of $580 to offset. 

This depicts a scenario for just one flyer. If all of about 260 economy passengers wanted to offset their carbon, around half a million trees would need to be planted this year for this one return flight alone. Multiply this by the many long-haul flights starting up again and the native tree planting scenario moves into the realm of fantasy.

So would planting exotic trees help? With the right tree, the right site, and the right management, the absorption of carbon in the early years would be sped up. But, the scale of planting is still unrealistic and the take up of carbon not fast enough to ensure the reductions required by 2030. The only realistic way of tackling emissions in the short to medium term is by reducing them.

That is not to say planting, whether it be of natives or exotics, is not useful in the longer term, say 30 to 100 or even 500 years. And, if done right, both exotics and natives can improve our biodiversity outcomes.

But the simple example of offsetting long-haul flights with native planting shows we need to shift away from an emphasis on offsetting and rapidly move to reducing emissions in whatever way we can.

Postscript by Robert McLachlan

Any mention of trees in our climate effort and I can’t help be reminded of the scene in Douglas Adams’s Hitchhiker’s Guide to the Galaxy in which a spaceship of management consultants has crash-landed on pre-historic Earth:

“Since we decided a few weeks ago to adopt the leaf as legal tender, we have, of course, all become immensely rich… But we have also run into a small inflation problem on account of the high level of leaf availability, which means something like three deciduous forests buying one ship’s peanut. So in order to obviate this problem and effectively revalue the leaf, we are about to embark on a massive defoliation campaign, and… er, burn down all the forests.”

The crowd seemed a little uncertain about this for a second or two until someone pointed out how much this would increase the value of the leaves in their pockets whereupon they let out whoops of delight and gave the management consultant a standing ovation.

We are now several decades into a national effort to use trees to allow us to keen burning fossil fuels a bit longer (and maybe make money in the process). But we didn’t follow through on that commitment – tree planting seriously tailed off after 2000, while forest clearing picked up.

Tree planting in the past and (under the Climate Change Commision’s ‘Balanced Pathway’) the future.

Somehow the government has to now balance our past mistakes, our immediate needs under the carbon budgets, and the long-term net zero requirement of the Zero Carbon Act. The carbon budgets cover all greenhouse gases and removals, so, other things being equal, more trees means less pressure to cut fossil fuels.

The Climate Change Commission thought that 1.5 million hectares of pine trees would be planted by 2050 if growers were paid $50 per tonne of CO2. But their ‘Balanced Pathway’ calls for 0.67 million ha of pine and the same again of new native forests. Meanwhile, foresters are cleaning up at the current price of $75 a tonne.

The Emissions Reductions Plan will be released next week, which should reveal how this is to be handled.

Carbon stored in trees is not only limited and temporary, it’s also highly uncertain. Each year, the Ministry for the Environment re-calculates the estimates for previous years. In 2021, the estimate for CO2 stored by forests in 2019 was 27.4 million tonnes; in 2022, the estimate for the same year is 23 million tonnes. And despite the improvements, the final uncertainty is still more than 12 million tonnes per year (New Zealand’s Greenhouse Gas Inventory, page 260). This has to make planning and meeting carbon budgets pretty tricky.

Read the 500-page greenhouse gas inventory and you, too, could be reminded of Douglas Adams.

Snow-where to go: Alpine grasshoppers will be amongst first victims of climate change in Aoteaora, but not the last 

Steve Trewick

The 2022 Winter Olympic Games presented us with the sickening spectacle of  artificial snowfields produced using fossil energy because the use of fossil energy has resulted in global temperature rise that now inhibits the natural accumulation of snow.   A crushing display of human indifference and misguided priorities.

The inconvenient lack of snow on skifields has critical biodiversity and ecosystem implications for Earth. A new study reveals that anthropogenic climate change will result in at least a quarter of our alpine species becoming extinct in the next 50 years. Species that are already endangered and others that are currently widespread could lose all their current habitat in Aotearoa New Zealand due to anthropogenic global warming. The future distribution of 12 grasshopper species were inferred by projecting current niche models onto the predicted New Zealand climate with 1oC or 3.7oC warming. The conclusion was that most of these alpine species that occur nowhere else on the planet, would lose at least 30% of suitable habitat.

The earth has already heated 0.66 oC in just 20 years, the  1oC threshold will soon be passed, and the IPCC has now emphasised that chronic failure to meet promises could soon push planetary heating beyond control. In the mountains of New Zealand we can expect the green rock-hopper will be extinct within a matter of years and our other widespread flightless grasshopper species will have reduced and fragmented habitat.

Populations of alpine animals are restricted to high-elevation ‘islands’ and most cannot jump or fly the gap to unconnected mountain habitat. This means that as the Earth warms, alpine species will find their habitat dwindling. In Aotearoa New Zealand most of our alpine plants and animals are found nowhere else in the world, and the list is growing with six new species of alpine wētā just described. [Listen here] When their habitat shrinks, we are set to lose a quarter of all our endemic alpine biodiversity, and that is just the start.

The treeline on a mountainside shows the climatic limit of conditions suitable for tree growth. At higher elevation, day-night and seasonal temperature extremes and aridity prevent trees establishing. That leaves the space open for other types of plants and alpine animals that can survive and reproduce in the short alpine growing season and stay alive through the winter. But with a warmer planet the treeline will move up, squeezing out our alpine ecosystems.

A clear and present danger

The IPCC has released its latest damning report in which they identify systematic and widespread failure to fulfil existing GHG emission reduction pledges. Solutions now require drastic action to curb GHG production AND work to recapture CO2 released into the atmosphere. COVID and recent wildfires and floods will be as nothing if continue with business as usual (BAU). The failure of governments around the world is our failure. Our indifference allows politicians to side-line the solutions in favour of perceived business interests, which we can translate as short-term gain. Politicians must be shown that business as usual  is not an option and all aspects of our existence need to be refocused on the climate problem.

Indifference now denies us the right to complain when the problems hits us; and they will hit us as individuals not future generations. The problem and the solution is not somewhere else, or someone else it is here and it is YOU.

Managing New Zealand’s greenhouse gas emissions from aviation

By Robert McLachlan and Paul Callister

New Zealand at COP26

On 10 November 2021 at COP26 in Glasgow, New Zealand along with twenty-two other countries joined the “International Aviation Climate Ambition Coalition”, committing to “Preparing up-to-date state action plans detailing ambitious and concrete national action to reduce aviation emissions and submitting these plans to ICAO well in advance of the 41st ICAO Assembly” . This Assembly of the UN’s International Civil Aviation Organization will take place in September 2022.

What would “ambitious and concrete action” to reduce aviation emissions look like for New Zealand?

Aviation is not only a large industry and a large emitter. It also underpins other sectors of the economy like tourism and trade, and it links globally dispersed families, even though an estimated 80% of the world’s population have never set foot on a plane. All of these aspects are particularly acute for New Zealand, whose geography and infrastructure influence even domestic travel. If a domestic Sustainable Aviation Fuel (SAF) industry were to develop, then agriculture, land use, and renewable energy use would be implicated as well. Psychologically, the rapid rise of cheap and comfortable air travel and its continued glamorisation in the media has built support for the status quo and made addressing its emissions more difficult politically.

If there is to be limited overshoot of 1.5 ºC, global net anthropogenic CO₂ emissions must decline by 45% from 2010 levels by 2030. As the chairs of the IPCC Special Report on 1.5 ºC write,

Without increased and urgent mitigation ambition in the coming years, leading to a sharp decline in greenhouse gas emissions by 2030, global warming will surpass 1.5 ºC in the following decades, leading to irreversible loss of the most fragile ecosystems, and crisis after crisis for the most vulnerable people and societies.

The Paris Agreement and the Zero Carbon Act

The 2016 Paris Agreement does not mention aviation specifically. Nevertheless, the agreement to limit warming to “to well below 2.0 ºC above preindustrial levels and pursuing efforts to limit the temperature increase to 1.5 ºC above preindustrial levels” and to reach net zero emissions globally in the second half of this century, does include all sectors, including international aviation and shipping, as does the agreement for developed countries to undertake “economy-wide” emission reductions.

The Zero Carbon Act adopts the 1.5 ºC target, interpreted as reaching net zero emissions of long-lived gases (mostly CO₂) by and beyond 2050, along with substantial cuts in short-lived gases (mostly methane). However, international aviation is not yet included either in the targets or the carbon budgets.

The urgent need to phase out the burning of fossil fuels, New Zealand legislation, the Government’s climate goals, international agreements, and emerging international action all point towards reducing aviation emissions.

In a new report, we survey a wide range of ‘Net Zero 2050’ scenarios for aviation and how they relate to New Zealand. A summary follows below.

Key aspects of New Zealand aviation emissions

  • CO₂ 4.9 million tonnes in 2019
  • Per-capita 6th highest globally at 1 tonne CO₂
    (cf. US 0.56t, EU 0.65t)
  • 12% of CO₂ emissions, cf 2.8% globally
  • Proven ability to grow emissions rapidly:
    International +40%, domestic +20% in 2015–2019
  • International passengers fell 97.6% in the 12 months to March 2021
  • Domestic aviation CO₂ included in NZ ETS and the falling cap on emissions
  • Founding member of the International Aviation Climate Ambition Coalition, committed to presenting an “ambitious and concrete national action plan” in 2022 to reduce aviation emissions

New Zealand’s aviation emissions

The factors behind aviation’s rapid growth are many, but two key ones are price and quality. Since Air New Zealand launched their Auckland–London flight in August 1982, prices have fallen 70% in real terms, while incomes have risen. Prices relative to income have fallen by a factor of 6. Long-haul flights have become steadily more reliable and comfortable over the decades.

More passengers means more flights. The Tourism Satellite Account lists more than 100 new and expanded routes during the 2015–2019 period of rapid growth, some of them extremely long, such as Auckland to Buenos Aires, Chengdu, Chicago, Doha, Dubai, and Ho Chi Minh City.

Our population has become more globally linked. In 1996, 17.5% of the New Zealand population were born overseas. In 2001, 19.5%; in 2006, 22.9%; in 2013, 25.2%, and in 2018, 27.4%. The two largest groups of migrants are from the UK (265,000 people) and China (144,000). Perhaps 1 million New Zealanders live overseas, including one in six Māori.

New technology

A lot of media attention has been focused on projects and proposals for “zero-emission” aircraft, of which the three main contenders are battery electric, hydrogen electric, and hydrogen combustion. (Emissions would be very low or zero during flight; lifecycle emissions including building the aircraft and making the fuel and providing renewable energy for it would not of course be zero.)

Nice computer graphics from Airbus, but irrelevant to the subject of this blog post.

There are two big problems with relying on new technology to deal with aviation emissions. The first is that the new aircraft do not exist yet, so the uncertainties are large and the time spans involved mean that industry and government scenarios do not envision much role for them out to 2050. The second is their energy requirements. A study by Ian Mason considered the prospects for hydrogen aviation, finding that 42 TWh of electricity could be needed by 2050—equal to New Zealand’s entire current supply. In addition, New Zealand would be attempting to replace all the fossil fuels used in land transport, and a lot of those used in industry, with electricity and/or hydrogen at the same time. Electrolysers tend to be placed where the fuel is needed, indicating a need for a 3800 MW electrolyser at Auckland airport, a power demand equivalent to about 6 times that produced by the Manapouri power station. (About 200 MW of electrolysis is currently in existence worldwide.) Power could be provided, for example, by 14,000 MW of wind turbines, i.e., 63 copies of the Turitea wind farm that is currently under construction at a cost of $370 million.

In other words, the energy requirements are extreme.

The lion’s share of many aviation pathways focus on sustainable aviation fuels (SAF). In 2019, 0.05% of global aviation fuel was biofuel, made from food crops and waste food such as tallow and used cooking oil. These are limited in supply. Therefore, pathways with high levels of SAF look to other feedstocks, especially (for New Zealand) wood waste and logs. However, there are no such plants in commercial operation. A report from the ICCT concluded that the EU could be capable of producing 2 Mt a year of wood-based biofuel by 2035, slightly more than New Zealand’s 2019 consumption of jet fuel. Closing the apparent gap—a factor of 100—will need close attention.

New Zealand is in the process of implementing a biofuel mandate for land transport, with a target of 9% biofuel by 2035. An initial study estimates that a $520 million plant could produce 57 million litres of fuel per year, 0.7% of New Zealand’s liquid fuel consumption, and that there is enough feedstock available for 20 such plants. A wood-to-fuel plant is presently under construction in the US by Lanzatech.

E-fuels, made directly from water and carbon dioxide (sourced from the air or from flue gases) and a lot of renewable electricity, can potentially be supplied in any amount. Some small trial plants are under construction in Europe. The obstacles are cost and (if the industry were to scale up) renewable electricity supply. The ICCT estimate that at 2 euro per litre support, the EU could produce 0.23 Mt a year of e-fuels by 2035. Their cost, five times the current price of jet fuel, would increase the price of travel while also reducing emissions at the source. The energy requirements are about twice that of hydrogen.

An ambitious scenario for 2035 for aviation SAF for New Zealand would involve two $520m wood-based biofuel plants (producing 57 million litres a year each) and one 100 MW e-fuel plant producing 40 million litres a year. Together they would provide 8% of New Zealand’s aviation fuel at 2019 levels of demand.

Although New Zealand has good potential resources of both renewable electricity and of feedstock for biofuels, significant capital investment and advance planning would be required to exploit them. Nevertheless, sustainable aviation fuel mandates open up pathways in which the higher costs of sustainable fuels lead to greater focus on efficiency and lower traffic growth.

The obstacles in the way of a technological solution to aviation emissions are formidable. In addition to cost, technological readiness, feedstock supply, and environmental side-effects, there are difficult timing issues. On one hand, emission reductions are needed now, but the alternatives are not ready; on the other, it is hard to reliably forecast the future cost of different solutions in order to make the necessary decisions now.

The industry view

Air New Zealand has taken an increasingly strong line on sustainability, which has been maintained and even strengthened during Covid. Their 2021 sustainability report was the first to outline a pathway to reach net zero by 2050. It involves 75% passenger growth by 2050, with net zero to be achieved by 20% of the emissions cuts coming from new conventional aircraft; 20% from zero-emission aircraft; 50% from SAF (implying an 86% SAF mandate); 2% from operations; and 8% from offsetting.

They see a need for strong government action to establish a domestic SAF industry, first based on forestry residues with a domestic plant running by 2027, then on waste, then (from 2045) on whole logs and e-fuels, with steady progress ensured via an SAF mandate. The head of Air New Zealand’s sustainability advisory panel, Jonathan Porritt, commented that

New Zealand will always be a price-taker. By 2030, it will be the big players in the industry who will be determining that price. The only way of managing that risk is for New Zealand to ensure its own, indigenous SAF capability—and that means taking big decisions in a clear and accountable way over the next couple of years.

The Ministry of Business, Innovation, and Employment will advise on an aviation SAF mandate in 2022, with the mandate proposed to start in 2025.


The entire topic of offsetting and its role in climate solutions is controversial. For example, Wim Carton discusses the supposed carbon, geographical, and temporal equivalences between positive and negative emissions, and concludes that climate justice requires their uncoupling:

Increasing carbon in terrestrial sinks simply replaces carbon that has been lost to the atmosphere over past centuries. Fossil carbon, on the other hand, is permanently locked away. Thus, burning fossil fuels moves carbon from permanent storage into the active carbon cycle, causing an aggregate increase in land, ocean, and atmospheric carbon. Once added, this additional carbon cannot be removed through natural sinks on time-scales relevant to climate mitigation.

In addition, on purely physical grounds, Kirsten Zickfeld concluded that a CO₂ emission into the atmosphere is more effective at raising atmospheric CO₂ than an equivalent CO₂ removal is at lowering it.

For these and other reasons, the NGO Climate Action Tracker recognises gross emissions only.

The issue is particularly acute for New Zealand, where mitigation pathways require forestry to rapidly and continuously increase to 2050 and beyond. Emissions from the first half of the century would be stored above ground and maintained by our descendants in the second half of the century.

EU Fit for 55, UK Jet Zero, and the IEA Net Zero scenario

Under “Fit for 55”, the EU will phase out free ETS allowances for intra-EU aviation (currently covering about half of such travel) over 2024–2027, and reduce the emissions cap of the whole ETS faster. They will tax jet fuel for intra-EU flights from 2023, with the tax rising to $250/tCO₂ by 2033. An SAF mandate will rise from 5% in 2030 to 20% in 2035 and 63% by 2050, for which only waste wood and fats and e-fuels will qualify.

Their model forecasts a baseline growth in emissions of 20% over 2015–2050, with the new proposals reducing emissions by 52% overall.

The UK’s Jet Zero has a headline goal of net zero aviation by 2050. On top of traffic growth of 54%, reductions come from demand reductions 9%; efficiency gains 36%; zero emission aircraft 4%; SAF 14%; and offsets 37%. SAF proposals are oriented around the establishment of a very large domestic industry, with 25–125 large SAF plants in the UK by 2050.

The International Energy Agency released an influential net zero study in 2021 . For aviation, their scenario involves business travel and flights longer than 6 hours held at 2019 levels; regional flights shifted to high-speed rail where feasible; total travel to increase 70% between 2019 and 2050; advanced biofuel and e-fuel use to reach 50% by 2040 and 78% by 2050; governments to define their SAF strategies by 2025 at the latest; and carbon prices across all advanced economies rising to US$130 by 2030 and US$250 by 2050.


Aviation growth and airport expansion go hand-in-hand.

In New Zealand, Auckland Airport’s long-held plans for a second runway have been put on hold by Covid, but a $1 billion airport redevelopment will go ahead. Wellington Airport is in the process of expanding; the first stage has been approved and is now under a court challenge. Christchurch Airport is proposing to build an entirely new international airport in Tarras, Otago, to serve the Queenstown–Wanaka region, again prompting environmental concerns. All three airports are partly publicly owned.

In the UK, the Balanced Net Zero pathway of the UK CCC requires no net airport expansion in the UK; but eight airports are currently planning expansions.


The growth of aviation has been tightly linked to the growth of tourism, both in New Zealand and worldwide. If aviation continues to grow, tourism will likely either continue in this role or become even more dominant. Through the 2010s the marketing of tourism continued to evolve, with talk of adventure and bucket lists for the upper middle classes in developed countries, and privilege and luxury for those on the highest incomes.

In January 2022, James Higham of the University of Otago co-edited a special issue of the Journal of Sustainable Tourism, writing in the introduction (“Code red for sustainable tourism”):

Governments need to take a leading responsibility, but we cannot currently expect this to come from national tourism administrations. […] Tourism administrations are guided by two key performance indicators: volume of (international) tourists, and volume of expenditure. Until their mandate changes, and they are required to develop metrics of success aligned with the Sustainable Development Goals and the Paris Agreement, any change will only happen as a result of other government departments that have a sustainability remit, particularly from those in charge of transport, energy and climate.

In 2021, the Parliamentary Commissioner for the Environment, Simon Upton, made tourism aviation emissions one of four key foci of a report on sustainable tourism. In view of the particular political and practical challenges of the sector, he made two modest recommendations: one, to incorporate an emissions price into the cost of air travel from New Zealand, along the lines of the UK’s departure levy, with revenues directed to decarbonisation R&D and Pacific climate finance; and two, to seek a plurilateral agreement, such as a climate club. So far, this has gone no further.

Stefan Gössling has proposed three areas of action for national and regional tourism bodies. First, to lower emissions by focussing on closer markets, longer stays, and lobbying for regulation of aviation emissions. Second, to add value by promoting local and year-round activities. Third, to reduce financial leakage due to franchises, foreign ownership, travel booking sites, credit cards, and frequent flyer programs.


The natural experiment of Covid has revealed the startling availability of substitutes for flying, including flying less, videoconferencing (which, although not an exact substitute, has perhaps connected more people than flying ever did), substituting domestic for international tourism, substituting local tourism for distant domestic tourism, and substituting land transport for domestic air travel.

The land transport options are private vehicles or public transport, bus and train.

Low-occupancy private cars are at present even higher-emission than flying and likely to improve only slowly on a fleet-wide basis. This option is high-emission for the vast majority of car owners, and not available at all for people who do not own a car or drive.

Regional public transport is limited to buses and trains. The passenger rail network, which had eight lines totalling 2700 km in 2001 and shrank to four lines and 1340 km by 2020, now just has three short routes left, Wellington–Palmerston North, Wellington–Masterton, and Hamilton–Auckland, totalling 348 km. For tourists, there is still the train from Christchurch to Greymouth. A private coach network still exists, but suffers from infrequent service, poor quality, substandard terminals, lack of connectivity, and lack of integrated ticketing.

Until the entire inter-regional transport system is considered as a whole, it will not be possible to assess the case for specific interventions such as rail electrification, resurrection of regional passenger rail, or an upgrade to higher-speed trains.

Emissions pricing

In New Zealand, domestic aviation is included in the Emissions Trading Scheme and in the carbon budgets. The first budget period covers 2022–2025. Prices rose from $39/tCO₂ to $85/tCO₂ in the year to 18 February 2022.

Therefore, one view is that no further action is needed on domestic aviation.

However, a recent review by one of us comes to an opposite conclusion, namely that emissions pricing can’t do it alone. The behaviour change and technological transitions are too demanding in the required time frame, and prices are unlikely to be allowed to rise high enough. Complementary policies can deliver emissions reductions in a fairer and more orderly way, even under a cap on emissions.

For example, the EU is proposing to use both an SAF mandate and a fuel tax, in addition to a strengthened ETS and a cap on (EU) emissions. European support for rail is also linked to reducing intra-EU aviation. The IEA’s net zero pathway also involves significant carbon pricing along with SAF and traffic regulation.

The tax advantage of international aviation (no ETS charge, no GST, no fuel tax) is an obstacle to emissions reduction. The legal obstacles to revising it were canvassed by the Parliamentary Commissioner for the Environment. They were a primary reason for his recommendation of a distance-based air passenger duty, as a pricing option that is legally available immediately. It could form the first step in a more comprehensive pricing regime. And now that the EU is proposing to tax jet fuel the options politically open to other countries may increase.

The distribution of air travel

Air travel is strikingly unevenly distributed. A large study of EU household emissions found that 90% of EU households have air travel emissions averaging 0.1 tonnes per person; 9% average 0.8 tonnes; and the last 1% average 22.6 tonnes. The authors write that this “confirms air travel as a highly carbon-intensive luxury” and describe transport as “one of the most unequally distributed and the strongest drivers of the carbon footprints of the rich”.

The implication is that other things being equal, an increase in inequality will be associated with an increase in flying, and in increase in GDP will be associated with a disproportionate increase in flying.

Statistics New Zealand are preparing a study of the distribution of emissions of New Zealand households.

From a study in Nature Energy of the role of high socio-economic status (SES) people in the climate crisis:

High-SES status people often lead hypermobile lives, travelling by air for private and work-related purposes induced by income, business travel paid for by employers and expectations associated with status, work and ownership of multiple homes. Although the behavioural plasticity of air travel is under-researched, it may be substantial for high-SES people given the likelihood that the marginal benefits of each flight are lower for them than for lower-SES people who may fly only rarely to visit family. Changing social norms around hypermobility therefore appear to be an important potential lever to decrease GHG emissions from air exposure and the glamorisation of high-SES people), as owners and managers of organisations, and through lobbying.

The problem is not just that the high emitters have to pay more towards the transition. The harder problem is that they actually have to reduce their emissions. Ivanova and Wood regard a target of 2.5 tonnes per person by 2030 as consistent with the Paris agreement. That means average emissions falling by 70%. But the bottom half of emitters can’t reduce by very much at all, which means the top half have to do more. The situation is particularly extreme in aviation: only flyers can reduce their aviation emissions.

Flying less

Most modern economists and policymakers do not engage in the question of what consumption is luxurious, wasteful, or unnecessary . On the other hand, some go further and argue that overconsumption is built in to capitalism, and that therefore reducing emissions will require significant changes in work, production, consumption, advertising, and social norms.

The widespread realisation of ecological overshoot and its catastrophic consequences, as well as humanity’s acceleration of unsustainable resource use when confronted with the reality of climate change, has prompted a wide range of responses. One framework is the “degrowth” movement, which calls for a decrease in global resource consumption until it reaches sustainable levels.

A decent standard of living actually requires very little energy. A global study describes a lifestyle involving 5000–15000 km of annual travel per person, of which 1000 km is by air, and total energy consumption of just 15 GJ/person/year, one-twelfth of New Zealand’s present consumption.

One of that study’s authors, Julia Steinberger, Professor of Ecological Economics at Lausanne, is an active voice in the climate movement:

In the UK, the “Jump” campaign asks people to sign up to six key lifestyle changes, one of which is to limit flights to one short-haul ( < 1500 km) return flight every three years, or one long haul return flight every eight years, levels derived from a study of urban lifestyles compatible with 1.5 ºC.

Applying the “avoid, shift, improve” framework to New Zealand aviation would likely reveal that the greatest opportunities lie in “avoid”. “Shift” also has a role in domestic aviation, for example by improving land-based low-carbon public transport. As we have learned from Covid, it is possible to avoid most international air travel with unexpected ease, whereas avoiding such a large proportion of emissions so quickly from food, housing, and goods and services without disastrous side-effects would be impossible.

James Higham examined aviation in light of the UN Sustainable Development Goals, noting that ICAO and the aviation industry claim that aviation contributes positively to almost all of the Sustainable Development Goals yet ignore the two most important factors, growth and emissions. Higham writes:

… aviation is deeply embedded in not only the economic, but also the social, functions of global capitalism. Because air transport is so “tightly bound up with the reproduction and expansion of capitalist societies”, there has been a reluctance to act on the environmental impacts of aviation. Rather than confront the problem of aviation emissions, the macro-level sociotechnical regime has been consciously developed to perpetuate growth in air travel.

It is difficult to define what flights are ‘essential’. The Ngā Tūtohu Aotearoa wellbeing indicators are monitored by Statistics New Zealand. While 81% of the population reported high overall life satisfaction in 2018, this rose to 84–86% in 2020–21, during a time when international travel was almost impossible (international passenger numbers fell 97.6% in the year to March 2021 compared to the previous year.) A further measure, on ‘leisure’, is under development: it will measure people’s amount of leisure time and their satisfaction with their amount of leisure time. It seems unlikely that international travel will impact on this score. Under the Material Wellbeing Index, ability to have a holiday away from home once a year scores one point (out of 35 points in total).

Noel Cass, in a study for Oxford University’s Centre for Research into Energy Demand Solutions, consider the role of curbing excess energy consumption in a fair transition. After comparing ten possible definitions of ‘excess’, they conclude that

excess is whatever people can agree it is, based on ideas of ‘fairness’ and ‘just’ levels of consumption that can be rationalised, defended, and justified to others…any policies that are used to target excess consumption and excessive consumers must be similarly reasonable and justifiable, based on the principles of deliberative democracy and exploring options, impacts, and fairness with members of the public.

What is a fair share for aviation emissions?

There is no universally agreed approach to this question.

One possible avenue follows the carbon budgets of the IPCC . Taking the remaining global carbon budgets for 1.5 ºC and allocating aviation 2.4% of global CO₂ leaves a carbon budget for global aviation of 9600 MtCO₂, or about ten years of flying at 2019 levels.

In 2019, New Zealand was responsible for 0.54% of global aviation emissions. Retaining this share and assuming aviation recovers to 2019 levels by 2024, followed by a decline to net zero in 2050, would see the carbon budget for 1.5 ºC exhausted by the early to mid 2030s.

Under the carbon budget approach, very sharp reductions in emissions are needed. However, earlier action makes meeting the budgets easier. Ensuring that 2019 levels are never regained would make meeting carbon budgets significantly easier.

Fairness towards future generations points towards relying as little as possible on carbon sequestration (whether by forestry or CCS) and focussing on absolute emissions reductions.

Fairness to all New Zealanders requires taking the (at present) highly unequal distribution of air travel, and the luxury and inessential nature of some air travel, into account, implying that aviation emissions should reduce more rapidly than other, more equal and more essential sectors.

In place of these considerations, the dominant narrative so far has been that, first, aviation is “hard to abate”; second, that it should be allowed to grow and to consume an ever larger share of gross emissions; and third, that it should not be subject to the “polluter pays” principle.

The experience of Covid indicates that even an almost complete stop to international aviation had surprisingly little effect on the economy (GDP grew 3.4% from 2019 to 2021) or effects on wellbeing. However, there are confounding effects for both of these, namely government economic stimulus, social solidarity, and knowledge of the health risks of travel. Substitutes including telecommunications, domestic tourism, and local tourism were adopted.

Taken together, these considerations imply that a naive “net zero by 2050” pathway, with steady traffic growth and heavily reliant on offsetting and nonexistent technology, would not sufficiently fair or ambitious for New Zealand.


The three main factors that will affect aviation emissions over the next 30 years are efficiency, alternative fuels, and total travel. Zero-emission aircraft will play a limited role.

Efficiency gains could be encouraged by carbon pricing, by an SAF mandate, or by banning the operation of high-emission aircraft models.

There is wide disagreement over the potential for alternative fuels and for the speed with which they can be supplied. Proposals for SAF vary widely and rely on technology which is not yet in commercial use.

Total travel also varies widely in the different pathways. The high growth scenarios are dubious for a number of reasons.

  1. They rely on significant amounts of offsetting (which is not sustainable in the long term) or permanent carbon dioxide sequestration (which is unproved at commercial scale)
  2. They rely to some degree on technological solutions, which may not be available quickly enough.
  3. They have not been found to be consistent with the Paris Agreement, nor to demonstrate its principles, including fairness, responsibility, capability, and highest ambition.
  4. They do not take into account the need to reduce fossil fuel burning drastically in the coming decade.
  5. They rely on a naive interpretation of the claim that aviation is “hard to abate” which has not been sufficiently justified or interrogated—for example, by comparing to other sectors which are also challenging technologically. As things stand, climate safety points towards phasing out “hard to abate” sectors where possible.
  6. Other things being equal, a net zero pathway with high growth will result in greater total emissions than a net zero pathway with low or negative growth. Under a finite carbon budget, it is the total emissions that are relevant, not the endpoint.
  7. A net zero pathway with high growth involves devoting greater total resources (of renewable energy, land, and construction of SAF facilities) than a pathway with low or negative growth. In a transition in which all of these resources are constrained, there is a need to prioritise resources.
  8. The high-growth scenarios, which generally show a continued acceleration of growth continuing past 2050, do not address fundamental questions of sustainability, even if net zero were to be reached.
  9. They do not take into account the distribution of aviation and its resulting implications for climate justice.

The past two years have seen numerous international bodies have aligned behind a vision of net zero aviation by 2050.

The main areas of difference between industry- and non-industry-led scenarios is that the former involve more growth—they often consider growth rates as given and not as a key variable—and reject emissions pricing. Some industry proposals seek government funding and subsidies. Some also reject regulation and rely on voluntary action and aspirational goals.

While pricing international aviation is difficult, which would by itself tend to point more towards regulation of emissions, some jurisdictions are now starting to consider it. Most likely, a combination of pricing and complementary policies will be needed .

A national action plan should include consideration of the following factors.

  1. Adoption of the “avoid, shift, improve” framework;
  2. emissions pricing and the “polluter pays” principle;
  3. where pricing is not achievable, regulation of emissions and emissions intensity;
  4. the non-CO₂ effects of aviation;
  5. the distribution of flying in a climate justice perspective;
  6. the availability of substitutes, and the national strategies for those substitutes (e.g., regional public transport);
  7. coordination with the tourist industry;
  8. the rate of growth or degrowth;
  9. the role of airports;
  10. timely implementation;
  11. emphasis on proven technologies, such as using the most efficient existing aircraft filled as much as possible;
  12. the lifecycle emissions and resource requirements of SAF, including land use, renewable energy, and facility construction;
  13. a fair share for aviation emissions with reference to the whole population and economy, not just to frequent flyers and the aviation industry; and
  14. the transition to true sustainability respecting the rights of future generations.

Two key events of the past half decade reinforce the urgency of the task. The first is the proven ability of the New Zealand aviation industry to increase emissions at a staggering rate when unregulated, as observed from 2015 to 2019; the second is Covid. Ensuring that aviation emissions remain permanently well below 2019 levels requires urgent action, but would make the longer-term task significantly easier.

Read the full report.

‘We do all need to change our ways of living’: Interview with David Hall on climate change and democracy

Dr David Hall is a political theorist with a research focus on climate change, sustainable finance, and land use. He has a DPhil in Politics from the University of Oxford and currently is Senior Lecturer at the School of Social Sciences and Public Policy, AUT University, and Chair of the Vice-Chancellor’s Sustainability Taskforce. He is also co-founder of Mōhio’s Climate Innovation Lab, a partnership with ANZ which designs novel financial instruments to enable climate action. His most recent book is A Careful Revolution: Towards a Low-Emissions Future (BWB Texts). He was interviewed by Robert McLachlan at the Auckland Art Gallery on 12 January 2022.

Robert McLachlan: Where do you see New Zealand’s climate response sitting right now?

David Hall: I see us still, in the international context, as a follower, and I think we’re in a phase of doing catch-up. The previous government dragged its heels more than the current government, which is now picking up on policies that other countries have implemented in the meantime. So there’s not much in the way of leadership, not much in the way of path-breaking, but there is policy transfer underway, with New Zealand adopting some of the trends from overseas, especially from Europe. This includes the Zero Carbon Act, which is one of many climate framework laws around the world, as well as the Clean Car Discount, the vehicle emissions standards, and so on.

Robert McLachlan: There are some new things emerging. There are youth climate activists and people interested in new urbanism. But there’s also a much bigger group of people who are happy with things the way they are, and may not realise the scale of the changes that need to be made. And the government has to thread their way through this.

David Hall: It is challenging. It’s easy to underestimate how difficult it is for politicians to navigate that space. Because they are relying on being voted back in, they just can’t run too far ahead of the public. But the public is changing, and climate action is becoming more vigorous and urgent among some people. And there’s a latent impulse, a sort of weak desire for action amongst the majority of people. The people who are demotivated, or proactively against climate action, are a minority, but there’s a large swathe who are aware of climate change and have a general tilt towards doing something, but are easily displaced by concerns about cost and inconvenience and are reluctant to change their ways of doing things. That’s the challenge for politicians, how to bring that set of people along.

However, while I think that some people too easily criticise politicians for not running ahead of voters, our leaders can justifiably be criticised for not doing enough to persuade and convince that group of people that we do all need to change our ways of living. Someone like our current prime minister, who does have the gift of communication, hasn’t used her powers as much as she might have to bring people on board.

Some of the narratives in which we’ve understood climate action have been failed narratives. I suspect that most politicians haven’t had enough exposure to the more positive narratives around climate action. There’s been a prevailing narrative that climate action is largely a sacrifice; it’s been framed in terms of cost, of deadweight loss. But there is a growing appreciation amongst some economists that it’s an investment with tangible returns and a huge swathe of co-benefits, so that we can address a lot of other issues by moving to a low-emission economy. It shouldn’t all be framed in terms of losses and costs. It’s an investment in the future and an opening up of new pathways, of new ways of living on the planet.

There’s also a competition underway – this is perhaps more relevant for the bigger economies, like the US and China – that the fossil fuel-dependent economy is a sunset economy, whereas the renewable energy economy has a huge amount of growth ahead of it. New Zealand needs to orientate to that, especially around the supply of food, timber, and biomass. We face a major risk of falling behind and not embracing these opportunities. Other countries might start to dominate in sustainable food and sustainable timber.

Robert McLachlan: I suspect there are a lot of people who would be happy to see new electric buses, but not so happy if a bus lane appears where they used to drive. But if there are enough people on the buses, the balance could shift. Hopefully we will reach a social tipping point soon.

Do you see the New Zealand climate change community as mostly unified in terms of what we should be doing?

David Hall: Not at all! There’s a huge amount of disagreement, and I think that will only grow. But I see that as a positive thing. A decade ago, the focus of public debate was on whether climate change was an issue at all, whether it even existed. That debate is over, and we’ve moved on to the question of what we ought to do. That’s going to drive a lot more disagreement, because you’re connecting solutions to a wide range of political values and risk sensitivities. This depends on your political affiliation, your identity, your position in society, your class. All of these influence what you see as sensible solutions and what you see as urgent. Disagreement here is an inevitable part of trying to come to a solution in a democracy.

Robert McLachlan: Genevieve Guenther has commented that climate should be framed in terms of bad people trying to do bad things that damage everybody else. Who’s opposing climate action in New Zealand? Is that what we should be focusing on?

David Hall: I’m not sure I agree with that framing. I see the problem as lying in the systems we are operating in, not as the fault of the people operating in those systems. In the US context it’s more obvious who the enemies or adversaries are, there’s so much money going into lobbying from the fossil fuel industry, bad actors who are trying to prevent any sensible solution – although we do have a bit of that.

But Carl Schmitt’s friend/enemy distinction – where you identify your allies and your enemies, and then you try to vanquish your enemies – that we see playing out here in agriculture is unhelpful. All it’s done is polarize the issue and make farmers feel they are being attacked and that positive developments in that sector are ignored. Even the recalcitrant farmers are part of an existing system. They’ve taken on mortgages where banks have pressed them to intensify, and some practices have been the subject of government incentives. Sometimes they’ve been manoeuvred into unsustainable practices by the system they’re operating in. Changing the system around them requires engaging with banks, policy makers, and so on. An adversarial approach doesn’t help. In fact sectors like agriculture and urban form are particular unsuited to an adversarial approach, or to emergency politics where some authority swoops in and makes decisions on everyone’s behalf. You have to work with communities to reshape the system. That requires coalition building and more democratic approaches.

Robert McLachlan: The global climate and ecological crisis is so vast – is it better to focus on one little question, which focuses your mind and the public’s mind on a specific issue and possible solutions, or to look at the big picture? I see a lot of people arguing that we need to overturn all of modern society.

David Hall: We should do what we think will have the most impact. Some people are better at specializing and some are better as generalists. I’m a generalist, I like to operate between a lot of different areas, perhaps because of my background in geography and politics. My focus is on how to change the politics of climate change. That requires understanding how our institutions create different forms of lock-in, how new institutions can drive human behaviour in different ways, to understand politics and power and the negotiation between governments and peoples.

Robert McLachlan: We’re trying to persuade the public to be more in favour of climate action, but even persuading our colleagues is difficult. The New Zealand universities haven’t really been leading on this issue.

David Hall: No, they’ve been a huge failure. But like the farmers, academics are trapped in a system with certain incentives that drive behaviour. Just look at aviation – international conferences, research collaborations, sabbaticals – these are all rewarded by the system, which drives academics to do as much flying as possible. Similarly, if research funding isn’t set up to channel research activity toward solving public problems, then we end up with this gulf between academic activity and real world challenges, like climate change. All that said, there are some academics who’ve used their academic role to advance climate action in the sciences, social sciences and humanities, and we should be grateful for those efforts.

Robert McLachlan: In countries where the government is hostile to climate action, it’s recommended to focus on grass-roots activism and coalition building. Are we in the same position here? Is the climate movement too small to push for the changes that we need?

David Hall. Yes. Everywhere suffers from this. The crucial thing is that that movement is happening in many different spaces. In climate governance, there is an idea of ‘polycentricity’, that leadership occurs not just in central government but across a whole range of spheres – local councils, business groups, local communities, indigenous groups, civil society. Under the previous government, when there was a conspicuous lack of progress or ambition, this prompted leadership from other parts of society. We saw the emergence of Generation Zero, the Climate Leaders Coalition, the Sustainable Business Council, Pure Advantage. Now that polycentric movement is maturing, which makes it safer for governments to take the plunge.

Robert McLachlan: I would like to see more local successes, though. Getting involved in a local battle over a cycleway or something can be discouraging.

David Hall: While the current government has been more proactive and has advanced a lot of policy, it’s tended to be at the institutional level of rules and standards. We don’t see the fruits of that yet, because the impacts will play out over years and decades. On the bright side, this reduces the likelihood of worst-case scenarios where New Zealand just drifts into massively missing its targets. But on the negative side, we’re still not seeing the decisive actions on the ground that show concrete results, like controlling imports of SUVs, for instance, or declaring phase-out deadlines or making big spending commitments on research, development and deployment. And the reason is, of course, that those are the actions that can trigger really fierce political fights because there are immediate winners and losers that politicians will have to answer to at the next election.

Robert McLachlan: Turning to the global picture, as well as the challenge of addressing climate change, there’s also a lot of other weird stuff going on. Dangerous situations are developing in the traditional democracies. Is it just a coincidence that these things are happening at the same time?

David Hall: No, I don’t think it’s a coincidence. Representative democracy is losing its social licence, its own right to govern. In some places the social contract is dwindling to the extent that large swathes of people think their representatives have lost the right to make rules on their behalf. But climate action needs those rules. So on one hand it makes action difficult, but on the other hand it is an opportunity. Because there is a truthful critique here, that representatives have failed to defend the interests of “the people” in a number of different domains. It is more likely that issues like inequality and mortality are driving the revolts we’ve seen elsewhere, but I think climate change and protecting people from the growing dangers and risks of environmental degradation are part of that story as well, whether people explicitly think of that as a reason or whether they just respond to some of the negative effects like floods and droughts, the effects on their businesses and supply chains, and the indirect contribution to poverty and economic disruption.

Robert McLachlan: People are right to be worried.

David Hall: Right. But political representatives have clearly failed to respond to these challenges. So if some of this unrest and discontent forces representative democracy, or democracy in general, to try to better achieve its own objectives in representing the will of the people and protecting people from these risks, then perhaps that will help is to create new institutions that do respond better. That’s the opportunity.

We see that most visibly in the new ideas about forms of invigorating democracy such as through citizens’ assemblies. It’s not a coincidence that we see that conversation now. And indeed, some states like France are using citizens’ assemblies as a way of responding to that criticism, following the gilets jaunes protests. There is an opportunity there. It’s a race for us who believe that we can respond to climate change in a democratic way to design new mechanisms and to implement these new mechanisms before the authoritarians and the despots exploit this opportunity to implement top-down and arbitrary institutions that they prefer.

Some sad clowns contemplate climate change at the Auckland Art Gallery.

New Zealand’s 2021 climate action

By Robert McLachlan

2021: the fourth year of the Labour-led government; the first in which it governs alone; the second year of the Covid pandemic; the last year before the Zero Carbon Act kicks in for real. What was achieved for the climate?

In terms of actually cutting emissions, – like removing petrol cars and coal boilers – not a lot. Apart from the Covid-induced slowdown, it’s unlikely that emissions have started falling. But changing the entire energy system takes time and preparation. 2021 was a year in which more ducks got in a row than ever before, some of them ducks never before seen in these parts.

Let’s check out those ducks and hear them squeak.

Duck 1: Renewable energy, especially solar

If 2019 was the end of a long wind drought, 2021 was the year in which solar power finally appeared. 

Before this year, New Zealand’s largest solar farm was Watercare’s 1 MW array, opened in October 2020.

Then in March, Kea Energy’s 2 MW solar farm in Marlborough (with 2-sided, sun-tracking panels!) was mostly completed.

Kea Energy's solar panel farm covers four hectares in the Wairau Valley.
Kea’s solar farm. Image: Kea Energy

In May, Lodestone Energy announced plans for 160 MW of solar across five locations in the upper North Island, to be built over 2021–2023.

In June, Kapuni Energy’s 2 MW solar farm in south Taranaki was completed.

In July, Far North Solar Farms kicked off their first 10 MW solar farm, Pukenui, in Northland, and announced plans to build 1000 MW by 2025.

In August, Genesis Energy announced a joint venture for 300 MW of solar farms, to be built over the next five years. It’s not clear what form the joint venture will take, as until now Genesis has declined to build any renewable generation itself, but has talked about buying renewable energy from others.

In December, Christchurch Airport announced a 150 MW solar farm, 30 MW of which will be built initially.

These farms are small compared to what is being built overseas, where 500 MW solar farms are now common, and small compared to what we’ll need in the future – perhaps 20,000 MW by 2050, which sounds like a lot, but it’s how much Australia has built in the past five years – but they are much larger than anything seen here before now. 

The combination of falling solar costs and increasing certainty that the government is determined to cut emissions seems to have finally done the trick. Solar now costs about 7c/kWh to build, about the same as new wind or geothermal power. 

Australians have been installing staggering amounts of home rooftop solar. We’re not seeing that here yet, although the combination of falling costs and rising electricity prices are bound to have an impact soon. A home solar array now costs $8000, and earns about $800 a year for the owners.

Some world leaders in rapid solar roll-out. It’s possible to scale up the solar industry rapidly and cheaply to add 2% of electricity per year. For New Zealand, that would mean building about 300 MW each year.

Less was happening in other areas, although stage 1 of the Turitea wind farm was progressively switched on, and in February, Meridian approved construction of the 176 MW wind farm at Harapaki near Napier.

Also in February, Contact Energy decided to build the 152 MW Tauhara II geothermal plant. This had been suspended last year because of uncertainty over Tiwai Point closure, which in January was delayed to 2024. Although better than coal or gas, the plant will emit 170,000 tonnes of CO2 a year, a point that was scarcely considered ten years ago when consent was granted.

In November, the second offshore wind energy conference was held in Taranaki, home of plentiful wind and shallow seas. (See the slides of the talks.)

So far, none of this has led to any coal or gas plants being decommissioned. That should happen soon. 

Duck 2: Coal angst

Mainstream and social media were fired up during the year by the massive increase in coal burning for electricity. Many pointed at the immediate cause, namely low lake levels, rather than the longer-term problem of a failure to build renewable supply and to phase out fossil fuels entirely. To the public it seemed to indicate a flaw in the whole idea of electric vehicles (Indonesian coal!!!), but at least the basic idea that coal is bad seems to have been understood.

As the lakes filled and the new wind farms switched on, the problem receded, hopefully never to return. 

Not what you should be seeing in a climate crisis. (Source: MBIE)

Duck 3: Transition plans appearing

In February, the Climate Change Commission released their draft advice, containing the carbon budgets out to 2035 and suggested pathways for achieving them. In November, the government responded, not with a plan as they had been required to do, but with an “Emissions Reduction Plan Discussion Document“. The plan itself has been delayed until May 2022. The document was criticised as half-baked. Only the transport section was fully detailed, probably because the Ministry of Transport had been hard at work for a while, releasing “Hīkina te Kohupara – Kia mauri ora ai te iwi: Transport Emissions: Pathways to Net Zero by 2050” in May. We’re starting to hear the creaking of some very large and interlocked wheels as our entire society prepares to change direction.

Each time a report like this appears, or indeed, any climate action at all is proposed, Matt Burgess from the New Zealand Initiative (formerly the Business Roundtable) comments that the suggested actions will not cut emissions by even a single tonne of CO2, because emissions are capped in the Emissions Trading Scheme. The argument is that any emissions cut in one place will be permitted to be emitted somewhere else. I wonder just what actions he thinks would in fact cut emissions, if the argument applies so universally. David Hall and I took apart his argument in a study of the international experience of emissions trading, which finds that it’s just one part of the whole system and cannot work just by itself. (David also wrote this week that Matt Burgess formerly worked for Charles River Associates, an economics consultancy that played a pivotal role in weakening, defeating, and delaying US climate policy since the late 1980s.)

Just to remind you of the scale of the problem, in April the figures for New Zealand’s 2019 emissions were released, and they were not good. They had shot up again, with CO2 emissions up 10%, or 3.8 million tonnes, in the three years 2016–2019.

Duck 4: Carbon price

After years in the doldrums, the carbon price in the New Zealand Emissions Trading Scheme finally took off, reaching $65 by the end of the year. (In Europe, prices reached 91 euros, $156.)

Source: Wikipedia

The whole market is rather complicated and mysterious. Some of these units have been purchased for future use, hedging against the expectation of higher prices. However, the government can choose to release fewer units in the future depending on the size of the stockpile, which would then send prices higher again.

In August, the government agreed to progressively raise the price ceiling each year, to reach $110/tonne in 2026. If the ceiling is reached, the government can choose to release extra units. This happened for the first time on 1 September, when 7 million units (permission to emit 1 tonne of CO2) were released, all of which were sold. The government may have to “pay back” these emissions in the future, although the cap on emissions doesn’t start until 2022.

In July, there was a consultation on reforming the free allocations given to certain export industries, such as tomato growers heating their greenhouses with coal.

But at a certain point, the Emissions Trading Scheme starts to make my brain hurt, so I’ll stop here.

Short version: higher carbon price = good; full picture not clear.

In July, Lawyers for Climate Action New Zealand filed for a judicial review of the Climate Change Commission’s advice, stating that the proposed emissions budgets are “irrational, unreasonable, and inconsistent with the purpose of the [Zero Carbon] Act”. The claim will be heard in the new year.

In August, All Aboard Aotearoa sued Auckland Transport and Auckland Council over a transport plan that fails to reduce emissions.

In December, the sustainable transport group Movement filed for a judicial review of the New Zealand Transport Agency’s $24 billion spending plan, on the grounds that it does not take into account their requirement to reduce transport emissions.

Duck 6: Action on car emissions, finally

The Clean Car Plan, the brainchild of Green MP Julie Anne Genter, which was to have brought in fuel efficiency standards and a system of CO2-based fees and rebates on new cars, was famously scuppered in 2020 by coalition partner New Zealand First. Freed of that shackle by the election, it resurfaced in June 2021 with a surprise twist: the rebates were front loaded and would come into effect immediately, in July. Market share for EVs jumped from 2% to 7%.

When we got to see the whole package, there was a further surprise: new emissions targets had be added for 2026 and 2027, and they are sharply lower. They will put us on track to end the import of petrol and diesel cars by 2030. The fossil parts of the car industry complained vociferously. The bill is now in parliament’s select committee, who will report back in February 2022.

Duck 7: Money for climate… next year

Between the motorway-heavy “NZ Upgrade” programme, announced in February 2020 just before Covid, emissions-heavy Covid stimulus spending (criticised by the Climate Change Commission), and one disappointing budget after another, government spending has not reflected the government’s supposed climate focus. One big win this year was the announcement in May that revenues from future auctions under the Emission Trading Scheme will be dedicated to climate change. Further details emerged this week: revenue of $4.5 billion over four years, and will go towards international climate aid, adaptation, and mitigation. Definitely a good start; in a year or two it should become clear whether emissions are tracking down fast enough.

Duck 8: Glasgow and the NDC

Despite heaps of (sometimes confusing) media attention on COP26 in Glasgow – if you missed it, you could do worse than watch Jonathan Pie’s very funny and on-point short film The World’s End – there was finally an agreement on the rules for international carbon trading. New Zealand has been relying on this, as just before COP26 our updated UN pledge was announced. Climate Minister James Shaw got the headline he wanted (“emissions to halve by 2030”) but the reality is somewhat different. Even Climate Change Commission head Rod Carr declined to say that the pledge met their advice.

There are so many potential problems with this, it’s hard to know where to start. For one thing, it is hard to imagine New Zealand spending billions of dollars to reduce emissions elsewhere while we continue to pollute at home. If I had to look for a silver lining, it would be that the target is a big step up on what we had before, and it will serve as an additional source of pressure to cut our own emissions.

So those are my eight ducks in a row, eight mostly hopeful signs of climate action in 2021. If it was all too cheerful and positive for you, don’t worry, the next post will look at some of the things we’re still overlooking and which I hope will receive more attention in 2022.

Happy New Year!

New Zealand’s Emission Reduction Plan

By Paul Callister and Robert McLachlan

Fifty years ago, on 26 November 1971, the film “Notes on a New Zealand City: Wellington”, directed by Paul Maunder, premiered on Wellington TV. The narrator asks if Wellington’s future will involve suburban sprawl, traffic, motorways, suburban shopping malls, and the decentralization of employment; or an alternative vision of medium-density apartments bringing a diversity of people into the inner city to live, work, and let their children watch the then-brand-new Cuba Street splash buckets. (And ride bicycles, many of which can be seen in the film.)

Although climate change isn’t mentioned in the film, the relevance could not be clearer. The extreme unsustainability of the path that was chosen fifty years ago is now understood in far greater detail. The necessity to rapidly and permanently reduce greenhouse gas emissions is merging with a renewed focus on the health, equity, community, biodiversity, and resource sustainability aspects of our cities, houses, transport, natural world, and industry – our entire way of life.

The Emissions Reduction Plan Discussion Document is full of good ideas. Public submissions close on 24 November. In our submission, we argue that, in addition, the plan should:

  1. Recognise that some individuals, companies, and activities are responsible for more present and historical emissions than others and that they should reduce their emissions more;
  2. Prioritise permanent gross emissions reductions over temporary reductions and temporary sequestration, and prioritise actions that hasten the phase out of the burning of fossil fuels for energy;
  3. As well as reducing the supply of greenhouse gas-intensive products, focus on reducing demand, via changes in consumption, shifts to low-greenhouse-gas alternatives, and the provision of public goods essential for wellbeing; and
  4. Reduce the carbon budgets so as to end to fossil fuel burning by 2050.

Why emissions pricing cannot do it alone

By David Hall and Robert McLachlan

There is strong agreement among economists that emissions pricing should play a central role in climate change policy. New Zealand has had a price on some carbon emissions through its Emissions Trading Scheme since 2010, although (COVID excepting) emissions have not yet fallen. Recently the scheme has been strengthened through higher prices, now NZ$65 per tonne of CO2, and a falling cap on emissions. It remains a central plank in our climate change response.

It’s been argued that the ETS should be our only mechanism to cut emissions, and that it will deliver the required cuts in the cheapest and most reliable way. The cap on emissions can even lead to absurd claims that any specific cut isn’t necessary, since total emissions will be the same regardless. (If you don’t fly, someone else will be free to emit that carbon in your place.)

Now the government, along the lines advised by the Climate Change Commission, has taken sides on this issue and is proposing a whole raft of policies for different areas, such as transport, industry, waste, and electricity. (Submissions are due by 24 November.)

There are now many countries with a price on carbon, and many of them also have a lot of non-pricing policies, like fuel efficiency standards. This provides an opportunity to look at the evidence of how well different approaches work. 

In a new working paper (Why emissions pricing cannot do it alone, Hall and McLachlan), we conclude that emissions pricing alone won’t trigger the necessary levels of behaviour change and technological transition quickly enough. Non-pricing policies do work, while pricing policies face obstacles to reaching high enough prices in a fair way. Consequently, we argue that the weight of evidence lies with using emissions pricing as part of a broader policy mix.