新数据显示,继过去几年的低迷之后,2023年中国对非洲可再生能源项目的投资出现反弹。
中国和非洲之间的气候合作是中非合作论坛的一个重点议题。论坛每三年举行一次。本次峰会于9月6日闭幕,有数十位领导人齐聚北京。

上届中非合作论坛于2021年举行,论坛发表了一项具有里程碑意义的宣言,将气候合作“定位为”未来合作的“重要支柱”。同年,中国政府宣布停止为煤电项目提供资金。
随之而来的是对能源项目的政策性银行贷款出现暂停,这引发了人们对中国在非洲能源贷款前景的担忧。然而,波士顿大学全球发展政策中心(Boston University Global Development Policy Center)的最新数据显示,随着银行调整战略,以遵循投资低碳能源和“小而美”项目的要求,这种暂停只是一种重置。
本文分析了这一转变,并探讨了中国为非洲未来可再生能源建设提供融资所面临的挑战。
“既有”利益
中国一直是非洲的能源项目,尤其是化石燃料项目的重要融资方。非洲约75%的电力来自化石燃料,尽管其能源相关的碳排放量占全球总排放量的不到3%,电气化率也是所有有人居住的大洲中最低的。
过去,中国的大部分融资都是由中国两家政策性银行——中国进出口银行和国家开发银行——支持推动的,而且主要针对燃煤电厂。
这两家银行在非洲各地发放了1820亿美元的贷款,主要投向了能源行业。波士顿大学全球发展政策中心的数据显示,从2000年到2023年,政策性银行贷款总额的15%流向了化石燃料行业,12%流向了水电站。
相比之下,发放给太阳能、风能或地热项目的贷款按价值计算不到1%。
这在很大程度上是由于中国官方出资者与国企之间既有联系。根据中南项目(China Global South Project)的数据,从历史上看,大多数中国国企都专注于煤炭和水电等传统电力领域。
英国开放大学(Open University)国际发展教育讲师弗兰顿·奇耶穆拉(Frangton Chiyemura)博士告诉Carbon Brief,中国在2000和2010年代的国际发展活动反映了当时中国自身的“内部发展轨迹”,因为中国也发展了以煤炭为主导的电力系统,而水电是最大的低碳能源。
他表示,在这个“走出去”的时期,非洲的大多数能源项目开发商——主要是中国国企——都专长于水电和煤炭,这导致更多此类项目获得融资并得以建设。
他补充说,这些国企“在保险、融资和与非洲各国政府接触方面都有国家支持……(而且)没有做太多试图建立市场的基础工作”。
“小而美”
2023年,中国进出口银行和国家开发银行承诺向三个能源项目注资5.02亿美元,包括布基纳法索的一个太阳能发电厂和马达加斯加的一个水电站,结束了2021年和2022年能源贷款的“中断”,如下图所示。

中国政策性银行在非洲的能源贷款暂停了两年,部分原因可能是新冠大流行期间的经济压力。
不过,波士顿大学全球发展政策中心认为,在中国国家主席于2021年承诺停止资助煤电,转而建设“小而美”的项目后,这些银行似乎也暂停了活动,以对其投资战略作出“必要的调整”。
2021年中非合作论坛气候变化宣言也确认,中国将进一步增加对非洲可再生能源和其他低碳项目的投资,“不会在国外建立新的燃煤发电项目”。
奇耶穆拉告诉Carbon Brief,这两年间的贷款减少并非中国政策性银行的“独有”现象。他补充称,在疫情期间,西方国家向非洲提供的贷款也有所下降。
他还同意,中国贷款机构将重点从“数量”转向“质量”,更多地考虑与新项目相关的投资风险和社会影响,这加速了投资的转变。
在此期间,中国的其他利益相关者——从中国电建集团和三峡集团等国企到晶澳科技等私企——都同意为可再生能源项目提供资金或参与项目建设。
根据睿纳新国际咨询公司(Development Reimagined)整理的独立数据(如下图所示),自2021年中非论坛以来,已有138个新的气候相关项目达成协议,而且在过去18个月里,这一数字还在加速增长。

数据库中记录的项目包括超过20吉瓦(GW)的太阳能项目、9吉瓦的水电项目以及1吉瓦的风电项目,如下图所示。

这些项目的资金来源广泛,包括中国和非中国企业、非洲和其他非中国金融机构,以及多边开发银行。
该咨询公司的项目经理兼中国气候融资政策负责人付亦可(Fu Yike;音译)对Carbon Brief说,在中国国家主席习近平2021年作出承诺后,中国国企已表示有兴趣“探索在非洲开展项目的新方式”,包括参与太阳能项目。
在数据库中列出的55个太阳能和风能项目中,国有企业分别参与了46个和5个。
根据睿纳新的分析,到2030年,中国在非洲的清洁能源项目装机可达224吉瓦,这意味着中国参与非洲的能源转型对于非洲实现2030年300吉瓦的目标至关重要。
付亦可补充说,特别是太阳能发电装机预计将成为中国未来在非洲能源部署的一大特色。
陡峭的“学习曲线”
总部设在伦敦的智库海外发展研究所(ODI)认为,中国“一带一路”倡议所建立的机制可以协助在非洲部署平价低碳技术,如同其促进了铁路和港口等中国国内基建产能向非洲“溢出”一样。
然而,奇耶穆拉告诉Carbon Brief,许多习惯于开发煤炭和水电的国企在转向可再生能源方面面临着巨大挑战。
此前,这些国企通过由政策性银行贷款资助的EPC总承包合同(即设计、采购和建造合同)来开发能源基础设施,这种合同只要求它们建设基础设施,而不负责运营和维护。
现在,非洲的决策者越来越多地推动采用股权融资模式,鼓励中国企业投资可再生能源项目并持有股份。
然而,奇耶穆拉表示,这种模式涉及到国企不太习惯的业务流程。
例如,埃塞俄比亚正在通过股权融资开发一座风力发电厂,从而减轻该国的债务压力。奇耶穆拉说,这意味着中国企业将不得不参与公开招标系统,而不是他们所习惯的闭门谈判。
“我记得一位(公司代表)说:‘为什么我要为一个(价值)可能只有8000万至9000万美元的项目浪费金钱和时间呢?’……企业认为,把时间花在(编写)招标文件上没有任何价值……但这表明它们在理解监管要求方面缺乏经验,而非洲的市场监管正在迅速变化。”
此外,付亦可认为,一些公司还对非洲的投资风险表示担忧。
大多数非洲国家在世界银行的“营商便利度”排名中靠后,这意味着监管环境不利于在当地创办和运营公司。
付亦可补充说,中国民营企业更愿意与国企合作,这可以将它们的参与与中国政府的利益更紧密地联系起来,从而限制它们的风险敞口。
奇耶穆拉与他人共同撰写的一篇论文也提到了这一点:“最近的趋势是在这些私营企业和国有企业之间建立一个联合体……很明显,在现有的政策群体中,新的联盟或利益集团正在形成,它们更加致力于促进风能和太阳能活动。”
奇耶穆拉称,部分原因是非洲在能源法规方面“快速变化”的环境。
非洲经济研究联合会(African Economic Research Consortium)合作研究经理戴安娜·恩吉·穆查伊(Dianah Ngui Muchai)认为,促进非洲投资的关键是针对可再生能源项目的“灵活和创新的(金融)工具”,以及“明确和现实”的政策目标。
奇耶穆拉告诉Carbon Brief,南非和埃塞俄比亚一直在尝试通过开发股权融资风电项目来实现这一目标。
“这是一条学习曲线,但我们相信也许在未来五到十年内……我们很可能会看到一些中国公司通过股权融资来开发这些项目。”他说。
中非论坛强调转向投资
这些主题在今年中非论坛的成果中得到了呼应。在主旨演讲中,习主席承诺向非洲提供价值3600亿元人民币(510亿美元)的资金支持。其中,2100亿元人民币(300亿美元)将通过信贷资金额度支付,700亿元人民币(100亿美元)将通过投资支付。
其中部分资金将用于资助一系列“清洁能源”项目,而“绿色发展”在会后的官方宣传中占据了重要位置。习主席在主旨演讲中指出,中方愿在非洲实施30个具体的清洁能源项目。
会后发表的宣言指出:“中方支持非洲国家更好利用光伏、水电、风能等可再生能源,进一步扩大在节能技术、高新技术产业、绿色低碳产业等低排放项目的对非投资规模。”
此外,与宣言同时发布的还有一份涵盖2025至2027年中非合作的行动计划,其中列出了指导未来三年中非合作的十大“伙伴行动”,包括“贸易繁荣”、“产业链合作”和“绿色发展”。

双方还将进行更广泛的能源合作,中方“将鼓励对非洲包括太阳能、风能、绿氢、水力发电、地热等可再生能源项目投资”。
习主席还告诉中非论坛代表,中国将“鼓励中非企业‘双向奔赴’投资创业……把产业附加值留在非洲,为非洲创造不少于100万个就业岗位。”
南非总统西里尔·拉马福萨(Cyril Ramaphosa)在新闻发布会上说,他“对习主席今天宣布的资金数额持非常积极的态度”,并补充说“这将是非洲大陆的一大福音”。
中南项目的分析则不那么乐观,认为报道标题上的数字“极具误导性”。
分析称,300亿美元的信贷额度“很可能………将更多地惠及中国企业,而非非洲利益相关者”,而100亿美元的投资数字“不应被视为政府财政承诺的一部分……因为(这笔资金)将由中国民营企业,尤其是采矿业企业提供”。
中南项目联合创始人埃里克·奥兰德(Eric Olander)告诉彭博社,这笔信贷可能会被用于“资助从中国购买大量太阳能电池板、电池和电动汽车”,以供非洲使用。
但非中政策咨询中心(Africa-China Centre for Policy and Advisory)高级研究员艾萨克·安克拉(Isaac Ankrah)博士告诉Carbon Brief,习主席对在整个非洲发展“绿色增长引擎”的关注凸显了中国“转向更具结构化的气候适应项目融资模式,重点关注技术转让、产能建设和可持续基础设施”。
他补充说,“这些承诺可能导致资金流的重新调整,使其更加符合非洲能源转型的具体需求”。
中非论坛对投资的关注是否会导致其切实远离贷款驱动型项目还有待观察,但一些非洲决策者将推动这种转变发生视为首要任务。
正如安哥拉财长维拉·戴维斯·德索萨(Vera Daves De Sousa)在接受路透社采访时所说:“我们需要打破常规思维: “我们需要跳出思维定式,因为‘你给我钱,我给你抵押品’的简单解决方案已经过时了。”
The post 深度报道:中国对非洲可再生能源的投资在沉寂两年之后反弹 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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