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On 12 February, US president Donald Trump revoked the “endangerment finding”, the bedrock of federal climate policy.

The 2009 finding concluded that six key greenhouse gases, including carbon dioxide (CO2), were a threat to human health – triggering a legal requirement to regulate them.

It has been key to the rollout of policies such as federal emission standards for vehicles, power plants, factories and other sources.

Speaking at the White House, US Environmental Protection Agency (EPA) administrator Lee Zeldin claimed that the “elimination” of the endangerment finding would save “trillions”.

The revocation is expected to face multiple legal challenges, but, if it succeeds, it is expected to have a “sweeping” impact on federal emissions regulations for many years.

Nevertheless, US emissions are expected to continue falling, albeit at a slower pace.

Carbon Brief takes a look at what the endangerment finding was, how it has shaped US climate policy in the past and what its repeal could mean for action in the future.

What is the ‘endangerment finding’?

The challenges of passing climate legislation in the US have meant that the federal government has often turned instead to regulations – principally, under the 1970 Clean Air Act.

The act requires the EPA to regulate pollutants, if they are found to pose a danger to public health and the environment.

In a 2007 legal case known as Massachusetts vs EPA, the Supreme Court ruled that greenhouse gases qualify as pollutants under the Clean Air Act. It also directed the EPA to determine whether these gases posed a threat to human health.

The 2009 “endangerment finding” was the result of this process and found that greenhouse gas emissions do indeed pose such a threat. Subsequently, it has underpinned federal emissions regulations for more than 15 years.

In developing the endangerment finding, the EPA pulled together evidence from its own experts, the US National Academies of Sciences, Engineering and Medicine and the wider scientific community.

On 7 December 2009, it concluded that US greenhouse gas emissions “in the atmosphere threaten the public health and welfare of current and future generations”.

In particular, the finding highlighted six “well-mixed” greenhouse gases: carbon dioxide (CO2); methane (CH4); nitrous oxide (N2O); hydrofluorocarbons (HFCs); perfluorocarbons (PFCs); and sulfur hexafluoride (SF6).

A second part of the finding stated that new vehicles contribute to the greenhouse gas pollution that endangers public health and welfare, opening the door to these emissions being regulated.

At the time, the EPA noted that, while the finding itself does not impose any requirements on industry or other entities, “this action was a prerequisite for implementing greenhouse gas emissions standards for vehicles and other sectors”.

On 15 December 2009, the finding was published in the federal register – the official record of US federal legislation – and the final rule came into effect on 14 January 2010.

At the time, then-EPA administrator Lisa Jackson said in a statement:

“This finding confirms that greenhouse gas pollution is a serious problem now and for future generations. Fortunately, it follows President [Barack] Obama’s call for a low-carbon economy and strong leadership in Congress on clean energy and climate legislation.

“This pollution problem has a solution – one that will create millions of green jobs and end our country’s dependence on foreign oil.”

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How has it shaped federal climate policy?

The endangerment finding originated from a part of the Clean Air Act regulating emissions from new vehicles and so it was first applied in that sector.

However, it came to underpin greenhouse gas emission regulation across a range of sectors.

In May 2010, shortly after the Obama EPA finalised the finding, it was used to set the country’s first-ever limits on greenhouse gas emissions from light-duty engines in motor vehicles.

The following year, the EPA also released emissions standards for heavy-duty vehicles and engines.

However, findings made under one part of the Clean Air Act can also be applied to other articles of the law. David Widawsky, director of the US programme at the World Resources Institute (WRI), tells Carbon Brief:

“You can take that finding – and that scientific basis and evidence – and apply it in other instances where air pollutants are subject or required to be regulated under the Clean Air Act or other statutes.

“Revoking the endangerment finding then creates a thread that can be pulled out of not just vehicles, but a whole lot of other [sources].”

Since being entered into the federal register, the endangerment finding has also been applied to stationary sources of emissions, such as fossil-fuelled power plants and factories, as well as an expanded range of non-stationary emissions sources, including aviation.

(In fact, the EPA is compelled to regulate emissions of a pollutant – such as CO2 as identified in the endangerment finding – from stationary sources, once it has been regulated anywhere else under the Clean Air Act.)

In 2015, the EPA finalised its guidance on regulating emissions from fossil-fuelled power plants. These performance standards applied to newly constructed plants, as well as those that underwent major modifications.

This ruling noted that “because the EPA is not listing a new source category in this rule, the EPA is not required to make a new endangerment finding…in order to establish standards of performance for the CO2”.

The following year, the agency established rules on methane emissions from oil and gas sources, including wells and processing plants. Again, this was based on the 2009 finding.

The 2016 aircraft endangerment finding also explicitly references the vehicle-emissions endangerment finding. That rule says that the “body of scientific evidence amassed in the record for the 2009 endangerment finding also compellingly supports an endangerment finding” for aircraft.

The endangerment finding has also played a critical role in shaping the trajectory of climate litigation in the US.

In a 2011 case, American Electric Power Co. vs Connecticut, the Supreme Court unanimously found that, because greenhouse gas emissions were already regulated by the EPA under the Clean Air Act, companies could not be sued under federal common law over their greenhouse gas emissions.

Widawsky tells Carbon Brief that repealing the endangerment finding therefore “opens the door” to climate litigation of other kinds:

“When plaintiffs would introduce litigation in federal courts, the answer or the courts would find that EPA is ‘handling it’ and there’s not necessarily a basis for federal litigation. By removing the endangerment finding…it actually opens the door to the question – not necessarily successful litigation – and the courts will make that determination.”

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How is the finding being repealed and will it face legal challenge?

The official revocation of the endangerment finding is yet to be posted to the federal register. It will be effective 60 days after the text is published in the journal.

It is set to face no shortage of legal challenges. The state of California has “vowed” to sue, as have a number of environmental groups, including Sierra Club, Earthjustice and the National Resources Defense Council.

Dena Adler, an adjunct professor of law at New York University School of Law, tells Carbon Brief there are “significant legal and analytical vulnerabilities” in the EPA’s ruling. She explains:

“This repeal will only stick if it can survive legal challenge in the courts. But it could take months, if not years, to get a final judicial decision.”

At the heart of the federal agency’s argument is that it claims to lack the authority to regulate greenhouse gas emissions in response to “global climate change concerns” under the Clean Air Act.

In the ruling, the EPA says the section of the Act focused on vehicle emissions is “best read” as authorising the agency to regulate air pollution that harms the public through “local or regional exposure” – for instance, smog or acid rain – but not pollution from “well-mixed” greenhouse gases that, it claims, “impact public health and welfare only indirectly”.

This distinction directly contradicts the landmark 2007 Supreme Court decision in Massachusetts vs EPA. (See: What is the ‘endangerment finding’?)

The EPA’s case also rests on an argument that the agency violated the “major questions doctrine” when it started regulating greenhouse gas emissions from vehicles.

This legal principle holds that federal agencies need explicit authorisation from Congress to press ahead with actions in certain “extraordinary” cases.

In a policy brief in January, legal experts from New York University School of Law’s Institute of Policy Integrity argued that the “major questions doctrine” argument “fails for several reasons”.

Regulating greenhouse gas emissions under the Clean Air Act is “neither unheralded nor transformative” – both of which are needed for the legal principle to apply, the lawyers said.

Furthermore, the policy brief noted that – even if the doctrine were triggered – the Clean Air Act does, in fact, supply the EPA with the “clear authority” required.

Mark Drajem, director of public affairs at NRDC, says the endangerment finding has been “firmly established in the courts”. He tells Carbon Brief:

“In 2007, the Supreme Court directed EPA to look at the science and determine if greenhouse gases pose a risk to human health and welfare. EPA did that in 2009 and federal courts rejected a challenge to that in 2012.

“Since then, the Supreme Court has considered EPA’s greenhouse gas regulations three separate times and never questioned whether it has the authority to regulate greenhouse gases. It has only ruled on how it can regulate that pollution.” 

However, experts have noted that the Trump administration is banking on legal challenges making their way to the Supreme Court – and the now conservative-leaning bench then upholding the repeal of the endangerment finding.

Elsewhere, the EPA’s new ruling argues that regulating emissions from vehicles has “no material impact on global climate change concerns…much less the adverse public health or welfare impacts attributed to such global climate trends”.

“Climate impact modelling”, it continues, shows that “even the complete elimination of all greenhouse gas emissions” of vehicles in the US would have impacts that fall “within the standard margin of error” for global temperature and sea level rise.

In this context, it argues, regulations on emissions are “futile”.

(The US is more historically responsible for climate change than any other country. In its 2022 sixth assessment report, the Intergovernmental Panel on Climate Change said that further delaying action to cut emissions would “miss a brief and rapidly closing window of opportunity to secure a liveable and sustainable future for all”.)

However, the final rule stops short of attempting to justify the plans by disputing the scientific basis for climate change.

Notably, the EPA has abandoned plans to rely on the findings of a controversial climate science report commissioned by the Department of Energy (DoE) last year.

This is a marked departure from the draft ruling, published in August, which argued there were “significant questions and ambiguities presented by both the observable realities of the past nearly two decades and the recent findings of the scientific community, including those summarised in the draft CWG [‘climate working group’] report”.

The CWG report – written by five researchers known for rejecting the scientific consensus on human influence on global warming – faced significant criticism for inaccurate conclusions and a flawed review process. (Carbon Brief’s factcheck found more than 100 misleading or false statements in the report.)

A judge ruled in January that the DoE had broken the law when energy secretary Chris Wright “hand-picked five researchers who reject the scientific consensus on climate change to work in secret on a sweeping government report on global warming”, according to the New York Times.

In a press release in July, the EPA said “updated studies and information” set out in the CWG report would serve to “challenge the assumptions” of the 2009 finding.

But, in the footnotes to its final ruling, the EPA notes it is not relying on the report for “any aspect of this final action” in light of “concerns raised by some commenters”.

Legal experts have argued that the pivot away from arguments undermining climate science is designed with future legal battles over the attempted repeal in mind.

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What does this mean for federal efforts to address climate change?

As mentioned above, a number of groups have already filed legal actions against the Trump administration’s move to repeal the endangerment finding – leaving the future uncertain.

However, if the repeal does survive legal challenges, it would have far-reaching implications for federal efforts to address greenhouse gas emissions, experts say.

In a blog post, the WRI’s Widawsky said that the repeal would have a “sweeping” impact on federal emissions regulations for cars, coal-fired power stations and gas power plants, adding:

“In practical terms, without the endangerment finding, regulating greenhouse gas emissions is no longer a legal requirement. The science hasn’t changed, but the obligation to act on it has been removed.”

Speaking to Carbon Brief, Widawsky adds that, despite this large immediate impact, there are “a lot of mechanisms” future US administrations might be able to pursue if they wanted to reinstate the federal government’s obligation to address greenhouse gas emissions:

“Probably the most direct way – rather than talk about ‘pollutants’, in general, and the EPA, say, making a science-specific finding for that pollutant – [is] for Congress simply to declare a particular pollutant to be a hazard for human health and welfare. [This] has been done in other instances.”

If federal efforts to address greenhouse gas emissions decline, there will likely still be attempts to regulate at the state level.

Previous analysis from the University of Oxford noted that, despite a walkback on federal climate policy in Trump’s second presidential term, 19 US states – covering nearly half of the country’s population – remain committed to net-zero targets.

Widawksy tells Carbon Brief that it is possible that states may be able to leverage legislation, including the Clean Air Act, to enact regulations to address emissions at the state level.

However, in some cases, states may be prevented from doing so by “preemption”, a US legal doctrine where higher-level federal laws override lower-level state laws, he adds:

“There are a whole lot of other sections of the Clean Air Act that may either inhibit that kind of ability for states to act through preemption or allow for that to happen.”

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What has the reaction been?

The Trump administration’s decision has received widespread global condemnation, although it has been celebrated by some right-wing newspapers, politicians and commentators.

In the US, former US president Barack Obama said on Twitter that the move will leave Americans “less safe, less healthy and less able to fight climate change – all so the fossil-fuel industry can make even more money”.

Similarly, California governor Gavin Newsom called the decision “reckless”, arguing that it will lead to “more deadly wildfires, more extreme heat deaths, more climate-driven floods and droughts and greater threats to communities nationwide”.

Former US secretary of state and climate envoy John Kerry called the decision “un-American”, according to a story on the frontpage of the Guardian. He continued:

“[It] takes Orwellian governance to new heights and invites enormous damage to people and property around the world.”

An editorial in the Guardian dubbed the repeal as “just one part of Trump’s assault on environmental controls and promotion of fossil fuels”, but added that it “may be his most consequential”.

Similarly, an editorial in the Hindu said that Trump is “trying to turn back the clock on environmental issues”.

In China, state-run news agency Xinhua published a cartoon depicting Uncle Sam attempting to turn an ageing car, marked “US climate policy”, away from the road marked “green development”, back towards a city engulfed in flames and pollution that swells towards dark clouds labelled “greenhouse gas catastrophe”.

Leo Hickman on Bluesky: China's Xinhua news agency has just published this editorial cartoon in response to Trump's rejection of climate policies

Conversely, Trump described the finding as “the legal foundation for the green new scam”, which he claimed “the Obama and Biden administration used to destroy countless jobs”.

Similarly, Al Jazeera reported that EPA administrator Zeldin said the endangerment finding “led to trillions of dollars in regulations that strangled entire sectors of the US economy, including the American auto industry”. The outlet quoted him saying:

“The Obama and Biden administrations used it to steamroll into existence a left-wing wish list of costly climate policies, electric vehicle mandates and other requirements that assaulted consumer choice and affordability.”

An editorial in the Washington Post also praises the move, saying “it’s about time” that the endangerment finding was revoked. It argued – without evidence – that the benefits of regulating emissions are “modest” and that “free-market-driven innovation has done more to combat climate change than regulatory power grabs like the ‘endangerment finding’ ever did”.

The Heritage Foundation – the climate-sceptic US lobby group that published the influential “Project 2025” document before Trump took office – has also celebrated the decision.

Time reported that the group previously criticised the endangerment finding, saying that it was used to “justify sweeping restrictions on CO2 and other greenhouse gas emissions across the economy, imposing huge costs”. The magazine added that Project 2025 laid out plans to “establish a system, with an appropriate deadline, to update the 2009 endangerment finding”.

Climate scientists have also weighed in on the administration’s repeal efforts. Prof Andrew Dessler, a climate scientist at Texas A&M University in College Station, argued that there is “no legitimate scientific rationale” for the EPA decision.

Similarly, Dr Katharine Hayhoe, chief scientist at the Nature Conservancy, said in a statement that, since the establishment of the 2009 endangerment finding, the evidence showing greenhouse gases pose a threat to human health and the environment “has only grown stronger”.

Dr Gretchen Goldman, president and CEO of the Union of Concerned Scientists and a former White House official, gave a statement, arguing that “ramming through this unlawful, destructive action at the behest of polluters is an obvious example of what happens when a corrupt administration and fossil fuel interests are allowed to run amok”.

In the San Francisco Chronicle, Prof Michael Mann, a climate scientist at the University of Pennsylvania, and Bob Ward, policy and communications director at the Grantham Research Institute, wrote that Trump is “slowing climate progress”, but that “it won’t put a stop to global climate action”. They added:

“The rest of the world is moving on and thanks to Trump’s ridiculous insistence that climate change is a ‘hoax’, the US now stands to lose out in the great economic revolution of the modern era – the clean-energy transition.”

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What will the repeal mean for US emissions?

Federal regulations and standards underpinned by the endangerment finding have been at the heart of US government plans to reduce the nation’s emissions.

For example, NRDC analysis of EPA data suggests that Biden-era vehicle standards, combined with other policies to boost electric cars, were set to avoid nearly 8bn tonnes of CO2 equivalent (GtCO2e) over the next three decades.

By removing the legal requirement to regulate greenhouse gases at a federal level from such high-emitting sectors, the EPA could instead be driving higher emissions.

Nevertheless, some climate experts argue that the repeal is more of a “symbolic” action and that EPA regulations have not historically been the main drivers of US emissions cuts.

Rhodium Group analysis last year estimated the impact of the EPA removing 31 regulatory policies, including the endangerment finding and “actions that rely on that finding”. Most of these had already been proposed for repeal independently by the Trump administration.

Ben King, the organisation’s climate and energy director, tells Carbon Brief this “has the same effect on the system as repealing the endangerment finding”.

The Rhodium Group concluded that, in this scenario, emissions would continue falling to 26-35% below 2005 levels by 2035, as the chart below shows. If the regulations remained in place, it estimated that emissions would fall faster, by around 32-44%.

(Notably, neither of these scenarios would be in line with the Biden administration’s international climate pledge, which was a 61-66% reduction by 2035).

US emissions, MtCO2e, under a “current policy” scenario in which the EPA removes key federal climate regulations
US emissions, MtCO2e, under a “current policy” scenario in which the EPA removes key federal climate regulations (“without climate regulations”) and a “no rollbacks” scenario in which regulations remain in place (“with climate regulations”). High, mid and low ranges reflect uncertainty around future fossil-fuel prices, economic growth, clean-energy technology costs and growth in liquified natural gas (LNG) export capacity. Source: Rhodium Group.

There are various factors that could contribute to continued – albeit slower – decline in US emissions, in the absence of federal regulations. These include falling costs for clean technologies, higher fossil-fuel prices and state-level legislation.

Despite Trump’s rhetoric, coal plants have become uneconomic to operate in the US compared with cheaper renewables and gas. As a result, Trump has overseen a larger reduction in coal-fired capacity than any other US president.

Meanwhile, in spite of the openly hostile policy environment, relatively low-cost US wind and solar projects are competitive with gas power and are still likely to be built in large numbers.

The vast majority of new US power capacity in recent years has been solar, wind and storage. Around 92% of power projects seeking electricity interconnection in the US are solar, wind and storage, with the remainder nearly all gas.

The broader transition to low-carbon transport is well underway in the US, with electric vehicle sales breaking records during nearly every month in 2025.

This can partly be attributed to federal tax credits, which the Trump administration is now cutting. However, cheaper models, growing consumer preference and state policies are likely to continue strengthening support.

Even if emissions continue on a downward trajectory, repealing the endangerment finding could make it harder to drive more ambitious climate action in the future. Some climate experts also point to the uncertainty of future emissions reductions.

“[It] depends on a number of technology, policy, economic and behavioural factors. Other folks are less sanguine about greenhouse gas declines,” WRI’s Widawsky tells Carbon Brief.

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‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak

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Antarctic sea ice has recorded its third-smallest winter peak extent since satellite records began 48 years ago, new data reveals.

Provisional data from the US National Snow and Ice Data Center (NSIDC) shows that Antarctic sea ice hit its annual winter peak on 14 September, with an extent of 17.59m square kilometres (km2).

The organisation notes that the data is still preliminary, adding that “large fluctuations in extent are typical of Antarctic sea ice near the seasonal maximum”.

One expert tells Carbon Brief that it is “concerning to see these low values persisting”, but says that scientists need more time to determine whether this represents a “structural shift” in Antarctic sea ice extent.

Meanwhile, at the Earth’s other pole, Arctic sea ice reached its annual minimum on 12 September, ranking as the joint-10th lowest in the satellite record.

The NSIDC notes that the last 20 years have seen the lowest 20 Arctic sea ice extents in the satellite record.

Antarctic peak

Dr Lettie Roach, a polar climate scientist at the Alfred Wegener Institute in Germany, tells Carbon Brief that this year’s Antarctic sea ice maximum was “well below average for the season”. She warns that, “after several decades of stable or increasing winter Antarctic sea ice conditions, it is concerning to see these low values persisting”.

She adds:

“Compared with the Arctic, it’s less clear how recent changes in Antarctic sea ice are attributable to human-caused warming vs natural variability. We need more years of observations to better understand whether this is truly a structural shift.”

Dr Clare Eayrs, a postdoctoral researcher at the Korea Polar Research Institute (KOPRI), tells Carbon Brief that, since recording a “near-average February minimum” extent, Antarctic sea ice has “returned to unusually low winter coverage”.

She notes that Antarctic sea ice extent in July and August this year were the fifth and fourth lowest on record, respectively, adding that “all five of the lowest July extents have occurred since 2022 and all four of the lowest August extents since 2023”.

The chart below shows Antarctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2023 (mid blue), the year of the smallest winter sea-ice maximum on record.

Antarctic sea ice peak in 2026 is third smallest on record. Daily Antarctic sea ice extent for 2026, 2025, and 2023, as well as decadal averages, million km2. Source: NSIDC. Line chart showing 2026 peak in September remaining below 1980s-2010s averages but above Sep 2023's lowest record. - (alt text generated by Google Gemini)
Daily Arctic sea ice extent for 2026 and 2025, with decadal averages for comparison, based on data from the NSIDC. Chart by Carbon Brief.

Eayrs tells Carbon Brief that the regional pattern of Antarctic sea ice cover “changed substantially during the growth season”.

For example, she says that “in April, the Bellingshausen Sea remained almost entirely ice-free, while the neighbouring Amundsen Sea had more ice than usual”.

However, by late August, changes in atmospheric pressure and wind meant that “the Bellingshausen deficit had largely recovered, while ice was unusually scarce in the Amundsen Sea and across much of East Antarctica”.

Map showing the main regions of the Antarctic.
Map showing the main regions of the Antarctic. Credit: Carbon Brief

Arctic minimum

Meanwhile, the Arctic recorded its minimum summer sea ice extent on 12 September. At 4.60m km2, this year ties with 2025, 2010 and 2008 as the 10th-lowest sea ice extent on record.

The chart below shows Arctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2012 (mid blue), the year of the smallest summer sea-ice minimum on record.

Arctic sea ice minimum in 2026 is tied for 10th smallest on record. Daily Arctic sea ice extent for 2026, 2025 and 2012, as well as decadal averages, million km2. Source: NSIDC. The line graph shows annual ice extent reaching September lows, with 2026 far below 1980s-2000s averages. - (alt text generated by Google Gemini)
Daily Antarctic sea ice extent for 2026 and 2025, with decadal averages for comparison, based on data from the NSIDC. Chart by Carbon Brief.

Roach tells Carbon Brief that although this minimum is not “record setting”, it is still “lower than any sea ice minimum before 2007”. She adds:

“Human-caused climate change has reduced Arctic sea ice cover and thickness, so the region is fundamentally different compared to a few decades ago.”

Scientists have been tracking Arctic sea ice thickness using a reanalysis produced called the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) since 1979.

In March 2026, the National Oceanographic and Atmospheric Administration (NOAA) terminated a global dataset of air pressure that scientists relied upon to produce PIOMAS, forcing both datasets to stop publishing updates.

The PIOMAS website says it will take “considerable effort and time” to find alternative data to use in their reanalysis. It adds that “we don’t yet have a good sense if that’s possible with available funds and if so, when we will be able to resume production of a new PIOMAS timeseries”.

Roach also notes that August saw record-breaking heat sweep across much of the world, explaining that high temperatures “extended into Arctic coastal regions, close to regions with substantial sea ice loss – particularly the Barents-Kara and East Siberian seas”.

Dr Zack Labe, a scientist at Climate Central, tells Carbon Brief that the absence of a new record does not mean that ice cover is becoming more “resilient”. He says:

“Local weather patterns across the Arctic play a really important role in year-to-year sea-ice extent, even as the long-term trend is clearly downward.”

Labe tells Carbon Brief that weather in the Arctic this summer was “influenced mainly by lower pressure toward the central Arctic, which brought cloudier and cooler conditions that limited surface melt and delayed the start of the melt season”.

He explains that this “was most obvious across parts of the Beaufort and Chukchi seas, where the melt season didn’t really kick off until after early July, which was more than two weeks later than normal”.

In contrast, he says, the Atlantic side of the Arctic “had a much more extreme summer”, with sea ice in the Barents Sea recording its “earliest melt-out on record”.

This was partly due to “unusually warm air and ocean temperatures”, Labe says. He notes, for example, that parts of western Siberia saw unusually persistent temperatures more than 5C above the 1981-2010 average for much of the summer, which extended out over the Kara Sea and contributed to substantial ice melt in this area”.

Map showing main regions of the Arctic.
Map showing main regions of the Arctic. Credit: Carbon Brief

Labe tells Carbon Brief that, going forward, scientists need “more data and observations of other sea-ice metrics, like ice thickness, which may give us better insight into the overall condition of the ice pack, especially during years like 2026 when it is very fragmented”.

(In March 2026, Arctic sea ice reached its peak extent for this winter, clocking in as the joint-smallest in a satellite record going back almost half a century.)

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COP31 attendees told not to interfere in Türkiye’s “internal affairs”

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Participants at COP31 in Antalya will have a “duty” not to interfere in Türkiye’s internal affairs under the country’s hosting deal with the UN, reviving a clause dropped for last year’s climate summit in Brazil that human rights groups warn could put activists at risk.

Türkiye has faced growing criticism from human rights groups over the jailing of opposition figures, journalists and activists and imposed a blanket protest ban around July’s summit of the NATO military alliance in Ankara.

The contested provision is included in the binding agreement between the UN climate secretariat and the Turkish government that sets out responsibilities over logistical arrangements and details participants’ rights and obligations.

The document, signed in June but only made public on Wednesday, gives accredited COP31 attendees immunity from legal action over what they say, write or do in connection with the conference. Climate Home News understands that this safeguard can be applied to what takes place both inside and, in certain circumstances, outside of the UN-controlled COP “Blue Zone”. For the first time, this protection explicitly continues after the summit ends.

Turkish riot police arrested protesters during the anti NATO protest on July 7, 2026 in Ankara, Turkey. (Photo by Sedat Suna/Getty Images)

But participants enjoying these “privileges and immunities” also have a duty to respect Türkiye’s laws and regulations and not to interfere in its internal affairs, the agreement states. Rights groups fear its wide-ranging formulation could be used to discourage criticism of the host government.

Climate Home News understands that whether an action is covered by the immunity or infringes on the host’s internal affairs would be evaluated on a case-by-case basis, with close coordination between the country’s authorities and the UN climate change body.

A separate provision states that immunity shall be waived where the UN believes it would “impede the course of justice”.

‘Chilling effect’

Those same provisions featured in the host country agreements for COP28 in the United Arab Emirates and COP29 in Azerbaijan, both regarded as authoritarian regimes, before being dropped for COP30 in Brazil.

Ann Harrison, climate justice policy advisor at Amnesty International, said it is “extremely disappointing” that the COP31 agreement re-introduced clauses that could “hinder the ability of human rights defenders and civil society organisations to conduct their work safely”.

COP31 electrification pledge leaves out clean power commitment

She added the provisions could have a “wider chilling effect” on rights to freedom of expression and peaceful assembly, given concerns over the human rights situation in Türkiye, including laws that “have shrunk civic space” and their “abusive” implementation by authorities.

The UN climate change body declined to comment.

Rights groups have documented blanket protest bans, unlawful use of force by the police and prosecutions of journalists, human rights defenders and lawyers across Türkiye in the last year.

Arrests and protest bans

Last July, environmental activist Esra Işık was sentenced to more than two years for “resisting” a public official over what Amnesty International described as a peaceful protest against an urgent expropriation order linked to the expansion of coal mining in south-western Türkiye. She is appealing the conviction.

Ahead of a summit of the NATO alliance in the capital Ankara in July, authorities put in place a 13-day blanket ban on demonstrations, citing “national security”, and arrested over 200 people. Human Rights Watch said the crackdown showed Türkiye’s “ruthless intolerance of freedom of speech and assembly”.

Earlier this month, Turkish police detained dozens of people as part of what rights groups described as the government’s widening crackdown on LGBTQ+ activists and venues.

Questioned by media as to how he would guarantee the right to protest at COP31, Kurum said earlier in September that his team would “try to meet” any request they receive from civil society and give them “a free space to express themselves”.

“Don’t worry, thinking you will not be able to voice your opinions or really share your thoughts,” he said in an attempt to reassure campaigners, adding that he had put former deputy environment minister Mehmet Birpinar in charge of liaising with civil society.

Civic space needed

Camilla Pollera, human rights and climate change campaigner at the Center for International Environmental Law (CIEL), said meaningful participation at COP31 is fundamental to the legitimacy of climate action.

“At a climate summit, civil society participation necessarily includes being present, speaking out, scrutinising governments’ decisions and climate policies, and advocating for communities most vulnerable to climate change,” she added.

Thousands march in a COP30 protest calling for climate justice and protection of the Amazon among other things in Belem, Brazil on November 15, 2025.
Thousands march in a COP30 protest calling for climate justice and protection of the Amazon among other things in Belem, Brazil on November 15, 2025. (Photo: Mariel Lozada/Climate Home News)

At last year’s COP30 summit, thousands of Indigenous people and climate activists peacefully marched through the Amazonian city of Belém in the first major demonstration outside the UN venue in four years. Smaller-scale demonstrations were largely confined to the “Blue Zone” at COP27 in Egypt, COP28 in the UAE and COP29 in Azerbaijan.

In two other separate incidents in Belém, members of the Munduruku tribe blocked access to the conference centre for hours, demanding an end to development projects in their ancestral land, and protesters stormed through the venue clashing with UN security officials.

The COP31 hosting agreement keeps some of the safeguards previously hailed by civil society groups. The government and the UN secretariat commit to upholding “the fundamental human rights” of all participants in the agreement’s preamble.

Under the deal, Türkiye also needs to ensure that security personnel follow “the highest ethical and professional standards and are expected to behave with integrity and respect”.

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Threatened by rising seas, small islands secure right to keep their statehood

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As rising seas submerge growing swathes of land, countries that lose territory should still keep their national boundaries, sovereign rights and UN membership, according to a political declaration adopted at the UN General Assembly in New York on Thursday.

The declaration, which was championed by climate-vulnerable small island states, affirms “the presumption in favour of continued statehood” in the face of sea level rise fuelled by climate change, and urges countries to work together to assist communities affected by encroaching oceans.

Speaking at a high-level UN meeting to address the existential threats posed by sea level rise, Cabo Verde’s Prime Minister Francisco Carvalho, one of the initiative’s co-facilitators along with Australia, said the adoption of the text by consensus sends “a message of hope”.

“This declaration has a very special meaning. For us, sea level rise is neither a distant threat nor a theoretical concern,” he said, adding that rising seas put at risk key infrastructure, water resources and economic growth in small island states.

In the Pacific, sea levels have risen at twice the global rate, dramatically increasing coastal flooding events from two to 20 a year in the Republic of the Marshall Islands, and from zero to 102 events per year in American Samoa, according to the World Meteorological Organization (WMO).

Surangel Whipps Jr., president of the Pacific island of Palau, said the summit in New York represents a “moment of international solidarity”, and highlighted that small island states will remain permanent members of the UN.

    Declaration recognises statehood

    An advisory opinion by the world’s top maritime court, the International Tribunal on the Law of the Sea (ITLOS), first upheld in 2024 that countries do not have to shrink their maritime borders even if they lose land territory due to sea level rise. This was reiterated by the International Court of Justice in last year’s landmark ruling on the climate obligations of states.

    The new declaration endorsed by all governments at the UN General Assembly stresses that sea level rise “is not a distant scenario but a real and lived experience for many”, and notes that international law must be implemented in global responses to rising seas.

    UN Secretary-General António Guterres said the “milestone must now be translated into action”, adding that the declaration should encourage an “ongoing dialogue” at the “highest possible level” leading to practical outcomes. Pacific islands have proposed an international treaty on sea level rise that would provide more legal certainty.

    “Those on the frontlines must be front and centre on every decision. We cannot allow countries and cultures to vanish beneath the waves,” he said. “The SOS has gone out. The world must answer.”

    At regional summit, Pacific islands ask for COP31 support for clean energy and finance

    Goodwin Friday, prime minister of St. Vincent and the Grenadines, said measures to protect vulnerable states will require adequate finance. “Investing in resilience now is more cost-effective than paying the far greater price for loss and damage later,” he added.

    Championed by Australia’s COP31 co-presidency, Pacific islands have sought to put adaptation to sea level rise and ocean conservation at the top of the political agenda by inviting world leaders to attend the pre-COP31 summit co-hosted by Fiji and Tuvalu in October.

    Tuvalu will also host the second global fossil fuel phase-out summit in April 2027, after around 60 governments met this year in Santa Marta, Colombia, to discuss ending their dependence on coal, oil and gas.

    “Our coastlines, our reefs and our communities are living with the consequences of fossil fuel dependence every day, and our people have earned the right to help shape the way forward,” Lynda Tabuya, Fiji’s climate minister, said in a statement announcing details of the conference.

    Secretary-General António Guterres attending the meeting on addressing the existential threats posed by sea level rise at UN headquarters in New York.
    Secretary-General António Guterres attending the meeting on addressing the existential threats posed by sea level rise. (Photo: UN Photo/Manuel Elías)

    Ocean monitoring gets a boost in New York

    Amid record-breaking marine heat and seas rising at unprecedented speed, governments in New York announced new commitments to protect the world’s ocean, as efforts to bolster marine ecosystems and coastal communities rise up the political agenda.

    On Wednesday, the EU and Canada announced more funding for a new Europe-led ocean monitoring system called OceanEye, launched in the aftermath of a failed attempt by the Trump administration to dismantle the largest existing network of deep-sea observatories.

    During an event at UN headquarters in New York, EU President Ursula von der Leyen and Canadian Prime Minister Mark Carney announced around $163 million in new funding for the initiative, with the EU pledging €92 million ($105m) on top of existing seed funding and Canada pledging C$82 million (US$58m) over five years.

    According to an EU statement, while OceanEye will collaborate with the Global Ocean Observing System, that network “remains vulnerable to financial shortfalls and geopolitical disruptions”. A group of 30 countries from Europe, Africa and the Americas joined an international initiative in support of OceanEye, including large coastal nations like Brazil, Namibia and Mexico.

    Von der Leyen said OceanEye “can make us the leading ocean data provider in a matter of years”, including by launching new satellites and installing new observatories in the deep ocean. “From outer space to the deepest ocean, our funding helps us keep watch beneath the waves,” she added.

    Carney said the initiative would help protect Canada’s Arctic region with real-time monitoring operating year-round. “We can’t protect what we can’t see,” he said, also highlighting that Canada had expanded conservation of its ocean territory from 1% a decade ago to 15% now.

    In New York, a group of 19 countries said they are either developing or implementing plans to sustainably manage all of their ocean territory, with 12 new nations joining the initiative. In a joint communiqué, they called on more countries to sign up ahead of COP31.

    Warnings of El Niño-fuelled extreme heat

    Scientists and world leaders have raised the alarm over this year’s record-breaking marine temperatures, which have persisted above historical peaks for more than 100 days as the naturally occurring El Niño phenomenon intensifies in the Pacific.

    Extreme ocean heat could become a threat to coastal ecosystems and communities, experts fear. Water temperatures 1.5C above normal levels have also rapidly fuelled a strong hurricane in the Pacific in recent days.

    Despite scientific calls for additional ocean conservation efforts, a report launched this week in New York warned that efforts to protect ocean ecosystems are lagging behind, with only 10% of the global ocean covered by conservation areas and just 3.5% designated as “effectively protected”.

    The post Threatened by rising seas, small islands secure right to keep their statehood appeared first on Climate Home News.

    Threatened by rising seas, small islands secure right to keep their statehood

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