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China Briefing handpicks and explains the most important climate and energy stories from China over the past fortnight. Subscribe for free here.
Key developments
Gearing up
PRE-COP COMMITMENTS: China has “become the defender of international cooperation on climate change”, said state-sponsored newspaper Global Times the day before COP30 opened. China’s commitment to “dual carbon” goals will be the “driving force” of building a “beautiful China”, said an article by the Communist party-affiliated newspaper People’s Daily under the byline of Wang Huning, chairman of the Chinese People’s Political Consultative Conference.

WORLD’S EXPECTATIONS: China’s deputy permanent representative to the UN, Geng Shuang, said the country is “globally recognised as the [one] with the strongest determination, the most vigorous actions” on tackling climate issues, reported news agency Xinhua. John Kerry, former US climate envoy, told the Shanghai-based Paper: “The global climate agenda has undergone a fundamental shift, and calls are being made for China to continue playing a leading role in the event of a possible absence of the US.”
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FINANCE PLEA: Meanwhile, Brazilian president Luiz Inacio Lula da Silva “urged” China’s vice premier Ding Xuexiang at a pre-COP30 meeting to “join financing initiatives for climate transition and resilience” and “help fund green technology and investment projects”, said the Hong Kong-based South China Morning Post (SCMP).
‘OUTPERFORM[ING]’ TARGETS: Most experts in a new survey expect China to “outperform” its 2035 emissions-reduction target, reported Bloomberg. About 71% of the surveyed experts believe China’s carbon-emission peak will “happen between 2026 and 2030, with most expecting it in 2028” – ahead of the official timeline of 2030, said Agence France-Presse.
Early moves
‘PROMISES KEPT’: China “keeps its promises and delivers on its commitments” on climate change, Ding said on 6 November, in remarks at COP30’s leaders summit, according to a transcript published by Communist party-affiliated newspaper the People’s Daily. Ding suggested that, to “advance” climate action, the world must “stay on the right track”, balancing “environmental protection, economic development, job creation and poverty eradication”. In addition, Ding said countries must “remove trade barriers” if the world is to meet its targets, said BBC News.
BUILDING COALITIONS: Over the weekend ahead of COP, Brazil, China and the UK co-led a summit on methane, launching initiatives that could “accelerate global action on methane and other non-CO2 greenhouse gases”, said a press release published on the COP30 website. These included “mobilising” at least $150m to support seven developing countries’ efforts, it added. China and the EU also agreed to join a Brazilian-led carbon-market coalition, Bloomberg reported, which “aims to develop common standards for monitoring, reporting and verification”.
TFFF FOREGONE: There are “still no guarantees” that China will contribute to Brazil’s Tropical Forest Forever Facility (TFFF), CNN Brasil said, contrary to reporting by Reuters in July that China might invest in the fund. The outlet added that Brazil may be able to push for Chinese participation again at the G20 meeting in late November. SCMP said “Chinese negotiators told their Brazilian counterparts that Beijing supported the fund in principle”, but cited the common but differentiated responsibilities concept as a reason not to commit.
OPENING STATEMENTS: In the face of an “intensifying” climate crisis, China “will not stop supporting” international action, Huang said at the opening of the China pavilion at COP30, attended by Carbon Brief. A number of representatives of major international organisations – including the UNFCCC’s Simon Stiell, the UN climate advisor Selwin Hart, UNEP executive director Inger Andersen – as well as Chinese climate envoy Liu Zhenmin all spoke at the event. Hart captured the mood, saying: “We are certain to count on the leadership of China over the course of the next two weeks, and also over the next decade.”
Trade spats
AGENDA FIGHT: The agenda for COP30 was “adopted on Monday as originally drafted without any amendments”, despite a request by a country group that includes China that the lineup include “provision of finance from rich countries and unilateral trade measures” such as the EU’s carbon border adjustment mechanism, Climate Home News reported. The topics are instead being discussed in presidency-led consultations, alongside calls from small-island states to push for greater emissions-cutting ambition and from the EU on emissions reporting. Carbon Brief’s Simon Evans set out the issues on Bluesky.
RIGHT HERE RIGHT NOW: The Like-Minded Developing Countries (LMDCs) group – of which China is a part – together with the Arab Group stated that unilateral trade measures “penalise developing countries and impact their ability to take action to address climate change”, reported Earth Negotiation Bulletin. They pushed back against arguments by Japan, the EU and others that discussions of unilateral trade measures would be “more appropriate under the World Trade Organization”, it added.
PRESIDENCY PAUSE: A “stocktaking plenary” on Wednesday ended abruptly with COP30 president André Corrêa do Lago announcing a further plenary on Saturday. Do Lago said that – despite “more than eight hours” of discussions – further consultations were still needed. Rumours are flying around how Brazil will manage this, with many expecting a COP30 decision responding to these thorny issues. It may be called a “cover decision” or be part of a “mutirão package”, a reference to an Indigenous word for collective efforts.
Cough up the cash
INDIA FOR BASIC: Meanwhile, according to a government press release, India has submitted a statement on behalf of the BASIC group, an institution initiated by China, as well as LMDCs, reaffirming that the “architecture of the Paris Agreement must not be altered, and that [common but differentiated responsibilities (CBDR)] remains the cornerstone of the global climate regime”. It added that “developed countries must…fulfil their obligations on finance, technology transfer and capacity-building to developing countries”, in particular by increasing adaptation finance flows by “nearly fifteen times” from current levels.
STATUS QUO: Chinese delegates have repeatedly emphasised China’s status as a developing country and the need for CBDR in early statements at COP. Writing in the Backchannel substack, Asia Society Policy Institute China climate hub and climate diplomacy director Kate Logan and E3G senior policy advisor Lily Hartzell wrote that China’s “high-level delegations have cautiously avoided any wording that might suggest a bid for formal climate leadership, particularly when it comes to climate finance”.
LEADING COMMENT: In his speech at the leaders’ summit, Ding stated that “developed countries should fulfill their obligations to take the lead in reducing emissions, honour their financial commitments and provide developing countries with more technical and capacity-building support”. This contrasts his address at COP29, where Ding highlighted China’s role in “provid[ing] and mobilis[ing]” climate finance – sparking much speculation that the country may soon change its approach to the topic.
COME BACK TO US: Li Gao, the head of China’s delegation at COP30, told Agence France-Presse that China “welcome[d]” the “Baku to Belém roadmap” towards the aspirational target of $1.3tn in climate finance by 2035 from all sources, but that it is “crucial” for the developed countries to fulfil their $300bn commitment made at COP29. Li added that “we hope that some day, and we also believe that some day in the future, the US will come back”, because “addressing climate change needs every country”.
Global south solidarity
KEY THEME: China is working towards “jointly creating a green future” for the global south, Huang said in a session on south-south development held on the first day of COP30, attended by Carbon Brief. He added: “We pay attention to the needs of developing countries.” President of the Belt and Road International Green Development Coalition (BRIGC) Zhao Yingmin said on a separate event at the China pavilion that “construction of the [Belt and Road Initiative (BRI)] is also an important driver for developing countries to advance their green transitions”. A number of initiatives were publicised during the first few days of COP, including an agreement between China, Malawi and Kenya on clean cooking and a project to collate “global case studies on green development” by BRIGC.
BUILDING CAPACITY: The BRIGC programme is “exactly the type of example we want [to see at] the COP – implementation, implementation, implementation”, said COP30 CEO Ana Toni, speaking at the launch event attended by Carbon Brief. Selwin Hart, special adviser to the secretary-general on climate action and just transition at the United Nations, emphasised at a China pavilion event that Brazil and China showed “leadership” in climate action, noting that “you [emerging economies] understand us better” than developed countries – referencing an understanding of the need for capacity building in global south countries.
‘FRANK REMARKS’: Meanwhile, an opinion article in the state-supporting Global Times, bylined simply as “Global Times”, quoted COP30 president André Corrêa do Lago saying “You can’t insist that China has to lower its emissions [and then] complain that China is putting cheap [electric vehicles] all over the world”. It added that these “frank remarks should serve as a wake-up call” against “politicising China’s green efforts”.
STRONG INTEREST: The two events on south-south cooperation, both attended by Carbon Brief, appeared to be the best-attended China pavilion events so far. One audience member, a Brazilian chemical engineer, told Carbon Brief that she was attending the session because she was interested in understanding China’s experience of navigating the energy transition as a developing country.
Views on the energy transition
‘CONCRETE PROGRESS’: “We have made concrete progress in energy transformation”, Li said at the China pavilion, adding it involved a “very hard effort”. Climate envoy Liu noted at the same event that “China, as a major country, reaffirms its confidence in achieving the [Paris Agreement] goals”. He said that China “sees the next 10 years as a critical period for delivering on the commitments made under the Paris Agreement”, adding: “We look forward to all countries delivering their contributions on this goal.”
FOSSIL PHASE-OUT?: In his opening speech at the leaders’ summit, Brazil’s Lula called on world leaders to draw roadmaps to “overcome dependence on fossil fuels”, adding that he was “convinced” that this could be done “despite [countries’] difficulties and contradictions”, Argus Media reported. In the opening session of the China pavilion, attended by Carbon Brief, UNEP’s Andersen said she “encourage[d] China to take even bolder action…[and] explore setting targets on coal”.
PRIORITIES FOR 2030: Lyu Wenbin, director general of China’s Energy Research Institute, stated that a key task in the next five years included “improving the quality of energy supply”, including “boosting non-fossil energy” while “shifting coal power to a supporting role” in the energy mix. He added that in the medium- to long-term, China will build an energy system that has “non-fossil energy as the main supply [of power] and fossil energy as a guarantee [of energy security]”.
FLAT OR FALLING: Meanwhile, analysis for Carbon Brief found that China’s carbon dioxide emissions were “unchanged from a year earlier in the third quarter of 2025, extending a flat or falling trend that started in March 2024”. The analysis has been covered widely in publications including China’s Global Times, the New York Times, Financial Times, Reuters, Bloomberg and on the frontpage of the Guardian.
Captured

Bai Quan, director of the Energy Research Institute of the Academy of Macroeconomic Research – a research institution managed by the National Development and Reform Commission – outlined how China’s energy landscape might evolve between 2024 and 2060, during the launch of the China Energy Transformation Outlook (CETO) 2025 at the China Pavilion, attended by Carbon Brief. Guest posts for Carbon Brief on previous CETO reports can be found here and here.
Watch, read, listen
EV MARKET: Research institute the Centre for Strategic and International Studies published a series of two videos talking about China’s EVs in the global market.
HEALTH AND CLIMATE CHANGE: The “Lancet Countdown” China report led by Tsinghua University found that “climate-related health risks in China reached record levels last year”, according to media outlet China.org.cn.
‘DOCUMENT 136’: China Power Enterprise Management analysed the impact of China’s “document 136” pricing reforms for new renewable energy projects.
CHINA-LAOS: A long article by Sky News talked about China’s “green technology exports” in developing countries, such as Laos.
789
The number of delegates China has sent to Belém, according to analysis by Carbon Brief. This includes more than 100 party delegates and almost 700 “overflow” delegates, including from local government, the private sector, non-government organisations and foreign consulting firms.
New science
Scientific Reports
“Environmental penalties indirectly influence climate-friendly technological innovation through their effects on the digital economy and financial technology”, according to a new study. The paper used data from Chinese cities to model this influence. The authors found that environmental penalties have a “U-shaped” effect, noting a “critical inflection point where environmental penalties shift from promoting to inhibiting these innovations”.
Scientific Reports
New research investigated the “carbon rebound effect”, defined in the paper as “the phenomenon in which, after energy efficiency improvements, carbon emissions rebound due to increased economic activity, thus undermining the reduction in emissions achieved through efficiency gains”. Using machine-learning methods, the authors assessed data from Chinese cities collected over 2010-21. According to the paper, the effect is stronger in the north of China than the south and in the east than the west.
China Briefing is compiled by Wanyuan Song and Anika Patel. It is edited by Wanyuan Song and Dr Simon Evans. Please send tips and feedback to china@carbonbrief.org
The post China Briefing 13 November 2025: COP30 special appeared first on Carbon Brief.
Climate Change
Despite African walkout, fractious land COP ends without drought deal
The African continent’s hopes for a legally binding agreement to combat drought have been dashed again, as UN land restoration talks in Mongolia passed the issue onto the next set of talks in Egypt in two years’ time.
For over a decade, Africa has pushed for a UN protocol on drought risk management that would acknowledge drought as an issue requiring a regional and global – not just a national – response, potentially paving the way for more finance to help ensure water is available when drought hits.
A formal protocol would enable countries to transition from reacting to drought once it hits to “a proactive enabling mechanism to address drought and its effects such as migration”, said a Tunisian negotiator on behalf of the African Group of countries last week. Once land is regularly too dry and infertile to grow crops or graze animals, people often leave to seek a living elsewhere.
But this effort to adopt a protocol, led by Africa, has been resisted at successive land restoration COPs under the UN Convention to Combat Desertification (UNCCD), mainly by developed countries, which argue that a legally weaker alternative – a framework – would be faster and cheaper to set up.
Governments at the previous COP in Saudi Arabia in 2024 failed to reach agreement despite talks running past midnight, while this year’s saw African officials coordinate a walkout from negotiating rooms on Wednesday morning, according to two sources at the talks.
Drought deal delayed until 2028
The IISD’s Earth Negotiations Bulletin, a non-governmental organisation which unlike the media is allowed to watch and report on closed-door talks, said a call to suspend negotiations on Wednesday showed negotiations had reached “boiling point” and “made some jaws drop”.
Negotiations resumed after a lunchtime meeting with the Mongolian COP presidency although governments were only eventually able to agree that they could not find consensus in Ulaanbaatar and should resume talks on an instrument to deal with drought in 2028.
Christine Colvin, WWF’s head of freshwater policy, told Climate Home News that, with droughts hitting from Honduras to the English region of Hampshire, something concrete – whether a protocol or a framework – is needed urgently “rather than the can being kicked down the road for another two years as will now happen with the protocol procrastination”.

But, in a closing press conference on Friday, the Mongolian minister presiding over talks celebrated that governments had reached consensus on several “contentious” issues and that agenda items blocked at this year’s COP17 would be put on the agenda for COP18 in Egypt.
US blocks agenda items
Other agenda items that divided countries were on measuring land degradation’s effects on women, enhancing the involvement of civil society and women in land COPs, and the UNCCD working more closely and effectively with the UN’s climate and nature conventions.
On the COP’s opening day two weeks ago, the US representative said the Trump government objects to these agenda items “on their premise and no amount of negotiation will allow us to join consensus on these items. As such we request that they be struck from the agenda at which time we will then be able to approve it, saving us valuable negotiating time.”
A US State Department spokesperson later told Climate Home News that the US wants the UN “to get back to basics by refocusing on its core mandate, eliminating overlap, and reducing competition for scarce resources”.
The spokesperson added, “that means prioritising the concrete work member states created [the UN] to do – rather than diverting limited time, attention, and resources toward social and political agendas, including gender-related initiatives.”

On COP’s first day, the European Union and Brazil pushed back against the blocking of these agenda items, with a Brazilian negotiator saying his country attaches “great importance” to them. But the Mongolian presidency directed governments to adopt the rest of the agenda without the controversial items, which were discussed privately with countries throughout the two weeks.
An EU statement, read out later by Irish minister Timmy Dooley, accused “some parties” (meaning national governments) of having adopted a “less constructive approach” and preventing “discussions on important matters from even commencing”.
The agenda items the US refused to engage with were never discussed and were only placed onto the agenda for the next COP on the last day. Those talks will take place in Egypt in two years’ time, with Donald Trump due then to be in his last year as US president.
No restoration without women
The blocking of the gender agenda item has stymied attempts, agreed on by governments at the last COP, to develop gender-specific indicators for the UNCCD’s next overall framework and to facilitate more women delegates at COPs. Women made up only about a quarter of delegates to COP15 in 2022, UNCCD analysis with the latest data shows
Criticising the move to keep gender off the agenda, the EU said in a statement that it welcomes “the attention being given at COP17 to women pastoralists and herders, recognising their contribution to sustainable land management and resilient rural livelihoods”.
The head of the UNCCD, former Egyptian environment minister Yasmine Fouad, said on Friday that “regardless that the agenda item was blocked”, she was proud that she and COP17 President Batmunkh Battsetseg had led the COP as women and attended the gender caucus (a meeting of groups supporting women at the talks).

“Without the women,” she told the closing press conference on Friday, “we will not be able to restore land, restore hope, restore life or restore even our children and grandchildren. And we will keep on pushing that agenda.”
The civil society agenda item aimed to allow NGOs to attend land COP negotiations, as they do at climate COPs, and included terms of reference for an Indigenous Peoples Caucus.
A representative of Indigenous Peoples told the COP’s closing plenary meeting that the group had “deep disappointment that the agenda of this COP has removed the dedicated space for indigenous peoples”. “We cannot restore the land while removing the voices of those who care for it,” she said.
On Tuesday, the UNCCD’s deputy head Andrea Meza was asked about Indigenous Peoples’ participation. She said that the blocking of “one agenda item” is “generating uncertainty in the progress” towards creating caucuses for Indigenous Peoples and for Local Communities within the talks.
Because of the “complex geopolitical situation” making it hard to obtain consensus, coalitions of the willing have become more important, she added.
Mining out, money in
Outside the formal negotiations, the summit was marked by a focus on the strongly Mongolian issues of the role played by pastoralists and rangelands like grasslands, as well as mining, in both degrading and restoring land.
Part of the conference was sponsored by Australian mining company Rio Tinto and its local partner Oyu Tolgoi. Their presence was protested by campaigners wearing T-shirts calling on the companies to “stop wasting drinking water” and to “get out of Mongolia”.

The UNCDD and others praised the success of the summit in raising more finance for land restoration. The COP saw institutions like the Asian Development Bank and Global Environment Facility pledge money to combat land degradation, with the UNCCD estimating that $645 million of new commitments were made.
An estimated $355 billion a year is needed through 2030 to meet global land restoration commitments, compared with around $77 billion currently invested. Private finance accounts for only around 6% of global investment, according to the UNCCD.
UNCCD chief scientist Baron Orr told a press conference that many of the announcements were public-private partnerships that use government money to “even the playing field” for companies that want to protect land, in a bid to ensure they are not disadvantaged compared with those that do not.
Such partnerships are a “huge opportunity”, he said, especially as “we’re not in a moment of public finance – public finance is tight in every country.”
The post Despite African walkout, fractious land COP ends without drought deal appeared first on Climate Home News.
Despite African walkout, fractious land COP ends without drought deal
Climate Change
Pacific islands seek backing for new regional fund ahead of COP31
Burdened by rising fuel import costs and an “ocean crisis” of record-breaking heat, Pacific island nations are seeking to build support for a new regional fund ahead of COP31, intended to channel investment into renewable energy, community resilience and ocean protection, experts said.
Leaders from the 18-member Pacific Islands Forum (PIF), including Australia and New Zealand, are expected to issue a call for global pledges to the Pacific Resilience Facility (PRF) at a high-level meeting this coming week in Palau, seeking to build a new model for financing climate action.
The new regional fund was formally launched in May this year and is meant to “serve communities at a community level”, swiftly channelling investments for their projects on the ground, according to Fiji’s assistant minister for foreign affairs, Lenora Qereqeretabua.
“We are expecting pledges for the PRF, and these funds will go to communities that apply,” she told journalists at an online briefing. “We have organised it in such a way that it makes our application processes much, much easier than applying for global funding.”
Qereqeretabua added that she expects that PRF funds will be “utilised by communities to protect themselves from climate change and the effects of climate change.”
The Pacific Islands Forum meeting is expected to shape the region’s priorities ahead of this year’s pre-COP, hosted by Fiji and Tuvalu, and COP31, which will be co-led by Australia and Türkiye.
At COP31, a dedicated session on the climate finance needs of small island states will seek to drive pledges into the PRF. The fund has so far received about $172 million in capital – with about $67 million coming from Australia – and aims to close the year with $500 million.
Ocean heat and fossil fuel shocks
Leaders from the Pacific will meet in Palau from Sunday amid an “ocean crisis” of record-breaking ocean heat caused by this year’s “super El Niño”, according to Kevin Chand, Pacific ocean policy director at National Geographic’s Pristine Seas conservation project.
Leaders at the PIF are expected to put forward commitments towards new marine protected areas, which will be key for shielding ecosystems from future climate extremes, Chand said. The forum is expected to issue a statement on the need for ocean action at COP31, and announce commitments towards reaching the global goal of protecting 30% of the planet’s land and sea ecosystems by 2030.
Rising ocean heat could lead to food insecurity and lost government earnings in the region, as key fish stocks like tuna start migrating away from their coastline in search of colder waters, said Coral Pasisi, director of climate change and sustainability at the Pacific Community (SPC).
Climate shocks are deepening existing economic pressures, as Pacific nations have spent up to a quarter of their GDP on fossil fuel imports due to the war in Iran, according to a recent report by the University of New South Wales (UNSW) in Australia.
Wesley Morgan, one of the study’s authors, told journalists that partner nations “ought to be putting their money where their mouth is”, and should support the energy transition in the Pacific by covering the upfront costs of switching from polluting diesel to solar power, batteries and electricity grid upgrades.
China keeps Indonesia’s battery dream afloat but future less certain
Given the increase in climate-related shocks and sea-level rise, the PIF should also mention the need to phase out fossil fuel extraction and consumption, said Sindra Sharma, international policy lead at the Pacific Islands Climate Action Network (PICAN).
Last year’s COP30 failed to deliver a global roadmap on transitioning away from fossil fuels, which led to a group of countries – including several Pacific island nations – pursuing their own fossil fuel phase-out summit in Santa Marta, Colombia. Next year’s conference will be hosted by Tuvalu and co-chaired by Ireland, which should also receive backing from the PIF, Sharma said.
Both the chairs of the Santa Marta coalition and the Australian COP31 co-presidency have vowed to continue a push for this topic to be discussed at COP31.

New fund to test allies
As local communities in the Pacific struggle to access global climate funds, the PRF’s planned model for quick, direct disbursements has “very solid and good” intentions, Sharma said, but it will need political and financial backing from donor countries.
“The proof is going to be when the fund actually starts operating and delivering to communities,” she added. “If there is too much bureaucracy in being able to access the funds, for example. These things will have to be scrutinised.”
The facility aims to deliver funds in two categories: one for climate adaptation and “disaster resilience”, and another for social and community resilience that includes areas like community capacity-building, education, data analytics and financial management, among others. It will launch its first call for proposals at the PIF.
Morgan added that Australia will need to “leverage global interests” so that funding is directed to the Pacific Resilience Facility “or else the Pacific won’t be able to trust Australia as a partner”. The country ratified the PRF treaty in May, triggering its entry into force.
“The perception [of Australia] in the region is genuinely divided, and it’s worth being honest about it,” Sharma said, adding that the pre-COP31 in Fiji, which is usually limited to a technical space for negotiations, will determine how meaningful Australia’s advocacy for the Pacific can be.
This time, Pacific nations want to use the pre-COP in early October as an opportunity to demonstrate the challenges their largely low-lying islands face and to advocate for their political priorities, including a renewed global effort to limit global warming to 1.5C by cutting emissions faster and deeper. World leaders are due to visit Tuvalu to experience the frontline of rising sea levels, although Australia and Fiji have yet to confirm who will attend.
“In Bonn, Australia was largely missing on the negotiated outcomes that we so urgently need to see. It’s not enough to get Pacific priorities on the agenda. Agenda placement is not delivery,” Sharma added.
The post Pacific islands seek backing for new regional fund ahead of COP31 appeared first on Climate Home News.
Pacific islands seek backing for new regional fund ahead of COP31
Climate Change
Climate change exposes 580 million children to 20 extra ‘heat-stress days’ every year
More than 40% of children under the age of 10 globally are already experiencing at least 20 additional “heat-stress days” due to climate change.
This is according to a new attribution study, published in Science Advances, which combines climate models with demographic data to assess the age groups and regions that are exposed to the most hot, humid days.
The study finds that children up to the age of nine already face more additional heat-stress days globally as a result of climate change than any other age group.
It adds that south Asia and west Africa are recording the greatest childhood exposure to dangerous levels of humid heat – largely because these regions have a rapidly growing population with the highest proportion of young children.
As the climate warms, children will continue to be more exposed to heat stress than any other age group, the paper warns.
The lead author of the study tells Carbon Brief that the findings should inform discussions about climate justice, noting that children in developing countries “have contributed the least to historical greenhouse gas emissions”.
Humid heat
High temperatures can be deadly. For example, the heatwaves that swept across Europe in the summer of 2026 have been linked to tens of thousands of “excess deaths”.
A prominent 2021 study found that children born in the 21st century will be exposed to more extreme weather events in their lifetimes than their parents and grandparents.
Four years later, a study conducted by scientists from the same team found that more than half of children born in 2020 – around 62 million people – will experience “unprecedented lifetime exposure” to heatwaves, even if warming is limited to 1.5C.
Now, the latest research from the same team finds that children already face greater exposure to dangerous levels of humid heat than adults as a result of human-caused climate change.
Extreme heat is particularly dangerous when combined with high humidity. In hot weather, the human body produces sweat to cool itself down. However, as humidity increases, sweating becomes less effective.
The study uses wet-bulb globe temperature – a measure of temperature that takes humidity and wind into account – to calculate heat stress. It defines a “heat-stress day” as any day with a wet-bulb globe temperature above 28C, as this is considered the threshold for “moderate heat stress”
The authors then use climate models to simulate global temperature patterns in the present-day climate. (The authors use the climate of 2023, in which human activity has caused 1.3C of warming, to represent the “present-day”.)
They then count the number of heat-stress days that each country records on average, per year. The authors then repeat this exercise, simulating a pre-industrial climate without human-caused warming.
By comparing the number of heat-stress days in the present-day climate with the number in a pre-industrial climate, the authors can determine how many extra heat-stress days were driven by climate change. They refer to these as “extra” or “attributable” heat-stress days.
The authors find that “low-latitude” countries, located in the tropics, record the most extra heat-stress days.
For example, the paper finds that people living in Côte d’Ivoire currently face 112 heat-stress days every year. It adds that around half of these are due to human-caused climate change.
In contrast, Germany sees only 0.1 heat-stress days per year in today’s climate on average, which is largely attributable to human-caused climate change.
Rosa Pietroiusti, a PhD student at Vrije Universiteit Brussel and lead author on the study, explains why this number may seem lower than expected.
She tells Carbon Brief that the paper “really focuses on humid heat, at levels that are relatively rarely felt in Europe”. She adds:
“Our data also doesn’t capture the urban heat island effect, due to the resolution of the data we use, which also would lead to underestimations of heat stress locally, and lead to a mismatch with what people are experiencing at local scales, particularly in cities.”
Inequality
Extreme heat affects some people more severely than others. Children, people over 65 and those with pre-existing medical conditions or certain disabilities are among the most vulnerable. This is because their bodies are less able to regulate their temperature.
The authors use gridded demographic data to determine the age structure of each country. From this, they calculate how many people from each age cohort are exposed to extra heat days as a result of climate change.
The research finds that globally, 583 million children under the age of 10 already live through at least 20 attributable heat days every year. This accounts for 44% of all children in this age bracket.
In comparison, 190 million people aged 60-69 face at least 20 attributable heat days per year, accounting for 30% of this age cohort.
The authors find that children face the greatest exposure to humid heat for two main reasons.
First, there are more young people alive today than older people, with 1.3 billion children aged under 10 in the world, compared to 0.6 billion people aged 60-69.
Second, they find that countries in Africa and Asia typically have rapidly growing populations with more young children. In contrast, many countries in the northern hemisphere – which are typically cooler – have older populations.
The map below shows how many extra stress heat days each country currently faces as a result of human-caused climate change. Darker reds indicate a higher number of attributable heat days. The blue circles show the percentage of the population under the age of 10, with larger circles indicating a higher percentage.

Warming world
The authors also repeat their analysis for a 1.5C and 2C warmer world. They use population estimates from the SSP2 scenario, which projects that the world’s population will peak at more than nine billion in the second half of the 21st century, with most growth occurring in low-latitude regions – especially in sub-Saharan Africa.
The research finds that, in today’s climate, 11% of all under 10s currently experience 100 or more extra heat-stress days per year due to climate change. In worlds warmed by 1.5C and 2C, the percentage rises to 13% and 23%, respectively.
In contrast, only 6% of all people aged 60-69 currently face 100 or more extra heat-stress days each year due to climate change. This number rises to 9% and 17% for 1.5C and 2C worlds, respectively.
These results are shown in the plot below. The three rows represent the climates of 2023 (top), a 1.5C world (middle) and a 2C world (bottom). The columns show different age cohorts, from the oldest on the left to the youngest on the right.
Each circle contains 100 coloured dots, with each dot representing 1% of the age cohort.
The colour of the dot represents exposure to annual heat-stress day, with darker dots indicating more heat-stress days. Grey dots mean that people experience fewer than one extra heat-stress day per year due to human-caused climate change, while black dots mean more than 150 extra heat-stress days due to climate change.
The figure shows that higher warming levels expose more people to heat stress and that younger cohorts tend to be worst affected.
For example, the top-right circle represents heat stress for under 10s in the present-day climate. Three of these dots are coloured black, indicating that 3% faced at least 150 attributable heat-stress days in 2023.

Pietroiusti tells Carbon Brief the study uses wet-bulb temperature because it is a “well-established heat stress metric”. However, she notes that it was not “explicitly defined to focus on children”. She continues:
“A really important step forward in the research community would be to link up climate science and health science experts to do research on what metrics are really most representative of, for example, health impacts and educational impacts that children will be suffering.”
Vulnerability
Dr Qinqin Kong, a postdoctoral researcher at the departments of medicine and health policy at Stanford University, who was not involved in the study, praises its “robust” methodology.
He tells Carbon Brief that the research provides “a timely quantitative evidence for discussions of climate justice, children’s rights and intergenerational equity”.
However, Kong suggests that the paper “may overstate the contrast between children and the elderly and underestimate the relative burden of older adults”.
He says:
“The elderly may also be more vulnerable due to their social circumstances. Children often benefit from parental supervision and caregiving, whereas many older adults live alone, have limited mobility and face barriers to accessing cooling or emergency assistance during heat events.”
Kong also notes that “people and societies in the mid-latitudes [for example, across much of Europe and North America] are less adapted to heat”, which may make them vulnerable to its impacts.
For example, he says that Europe “shows substantially stronger relative risk of heat mortality likely due to less heat-acclimatised populations, lower air conditioning prevalence and urban designs that don’t favour heat dissipation”.
Similarly, Dr Daniel Vecellio – a researcher at the University of Nebraska, who was not involved in the study – tells Carbon Brief that children are an “understudied cohort”.
However, he says there is “reason for hope” because “children are typically pretty good behavioural adapters to extreme heat” and because people who are “chronically exposed to extreme heat” will “have a better chance at better acclimatisation”.
Pietroiusti tells Carbon Brief that global reporting on heatwaves is often skewed towards wealthier nations.
For example, she notes that large-scale databases of disasters, such as EM-DAT, often underrepresent heatwaves in Africa, due in part to a lack of news coverage and formal reporting. She adds:
“Studies like this, which start from the climate data, can start to fill some of these gaps.”
She adds that the paper should inform discussions about climate justice, noting that children in developing countries, who are most severely affected by the increase in heat-stress days, “have contributed the least to historical greenhouse gas emissions”.
Pietroiusti, R. et al. (2026) Age-specific exposure to human-induced increases in humid heat, Science Advances, doi:10.1126/sciadv.aeb3232
The post Climate change exposes 580 million children to 20 extra ‘heat-stress days’ every year appeared first on Carbon Brief.
Climate change exposes 580 million children to 20 extra ‘heat-stress days’ every year
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