Developed countries have poured billions of dollars into railways across Asia, solar projects in Africa and thousands of other climate-related initiatives overseas, according to a joint investigation by Carbon Brief and the Guardian.
A group of nations, including much of Europe, the US and Japan, is obliged under the Paris Agreement to provide international “climate finance” to developing countries.
This financial support can come in forms such as grants and loans from various sources, including aid budgets, multilateral development banks (MDBs) and private investments.
The flagship climate-finance target for more than a decade was to hit “$100bn a year” by 2020, which developed countries met – albeit two years late – in 2022.
Carbon Brief and the Guardian have analysed data across more than 20,000 global climate projects funded using public money from developed nations, including official 2021 and 2022 figures, which have only just been published.
The data provides a detailed insight into how the $100bn goal was reached, including funding for everything from sustainable farming in Niger to electricity projects in the United Arab Emirates (UAE).
With developed countries now pledging to ramp up climate finance further, the analysis also shows how donors often rely on loans and private finance to meet their obligations.
- The $100bn target was reached in 2022, boosted by private finance and the US
- Relatively wealthy countries – including China and the UAE – were major recipients
- A tenth of all direct climate finance went to Japan-backed rail projects
- There was funding for more than 500 clean-power projects in African countries
- Some ‘least developed’ countries relied heavily on loans
- US shares in development banks significantly inflated its total contribution
- Adaptation finance still lags, but climate-vulnerable countries received more
- Methodology
The $100bn target was reached in 2022, boosted by private finance and the US
A small handful of countries have consistently been the top climate-finance donors. This remained the case in 2021 and 2022, with just four countries – Japan, Germany, France and the US – responsible for half of all climate finance, the analysis shows.
Not only was 2022 the first year in which the $100bn goal was achieved, it also saw the largest ever single-year increase in climate finance – a rise of $26.3bn, or 29%, according to the Organisation for Economic Cooperation and Development (OECD).
(It is worth noting that while OECD figures are often referenced as the most “official” climate-finance totals, they are contested.)
Half of this increase came from a $12.6bn rise in support from MDBs – financial institutions that are owned and funded by member states. The rest can be attributed to two main factors.
First, while several donors ramped up spending, the US drove by far the biggest increase in “bilateral” finance, provided directly by the country itself.
After years of stalling during the first Donald Trump presidency, when Joe Biden took office in 2021, the nation’s bilateral climate aid more than tripled between that year and the next.
Meanwhile, after years of “stagnating” at around $15bn, the amount of private investments “mobilised” in developing countries by developed-country spending surged to around $22bn in 2022, according to OECD estimates.
As the chart below shows, the combination of increased US contributions and higher private investments pushed climate finance up by nearly $14bn in 2022, helping it to reach $115.9bn in total.
Both of these trends are still pertinent in 2025, following a new pledge made at COP29 by developed countries to ramp up climate finance to “at least” $300bn a year by 2035.
After years of increasing rapidly under Biden, US bilateral climate finance for developing countries has been effectively eliminated during Trump’s second presidential term. Other major donors, including Germany, France and the UK, have also cut their aid budgets.
This means there will be more pressure on other sources of climate finance in the coming years. In particular, developed countries hope that private finance can help to raise finance into the trillions of dollars required to achieve developing countries’ climate goals.
Some higher-income countries – including China and the UAE – were major recipients
The greatest beneficiaries of international climate finance tend to be large, middle-income countries, such as Egypt, the Philippines and Brazil, according to the analysis.
(The World Bank classifies countries as being low-, lower-middle, upper-middle or high-income, according to their gross national income per person.)
Lower-middle income India received $14.1bn in 2021 and 2022 – nearly all as loans – making it by far the largest recipient, as the chart below shows.
Most of India’s top projects were metro and rail lines in cities, such as Delhi and Mumbai, which accounted for 46% of its total climate finance in those years, Carbon Brief analysis shows. (See: A tenth of all direct climate finance went to Japan-backed rail projects.)
As the world’s second-largest economy and a major funder of energy projects overseas, China – classified as upper-middle income by the World Bank – has faced mounting pressure to start officially providing climate finance. At the same time, the nation received more than $3bn of climate finance over this period, as it is still classed as a developing country under the UN climate system.
High-income Gulf petrostates are also among the countries receiving funds. For example, the UAE received Japanese finance of $1.3bn for an electricity transmission project and a waste-to-energy project.
To some extent, such large shares simply reflect the size of many middle-income countries. India received 9% of all bilateral and multilateral climate finance, but it is home to 18% of the global population.
The focus on these nations also reflects the kind of big-budget infrastructure that is being funded.
“Middle-income economies tend to have the financial and institutional capacity to design, appraise and deliver large-scale projects,” Sarah Colenbrander, climate programme director at global affairs thinktank ODI, tells Carbon Brief.
Donors might focus on relatively higher-income or powerful nations out of self-interest, for example, to align with geopolitical, trade or commercial interests. But, as Colenbrander tells Carbon Brief, there are also plenty of “high-minded” reasons to do so, not least the opportunity to help curb their relatively high emissions.
A tenth of all direct climate finance went to Japan-backed rail projects
Japan is the largest climate-finance donor, accounting for a fifth of all bilateral and multilateral finance in 2021 and 2022, the analysis shows.
Of the 20 largest bilateral projects, 13 were Japanese. These include $7.6bn of loans for eight rail and metro systems in major cities across India, Bangladesh and the Philippines.
In fact, Japan’s funding for rail projects was so substantial that it made up 11% of all bilateral finance. This amounts to 4% of climate finance from all sources.
While these rail projects are likely to provide benefits to developing countries, they also highlight some of the issues identified by aid experts with Japan’s climate-finance practices.
As was the case for more than 80% of Japan’s climate finance, all of these projects were funded with loans, which must be paid back. Nearly a fifth of Japan’s total loans were described as “non-concessional”, meaning they were offered on terms equivalent to those offered on the open market, rather than at more favourable rates.
Many Japan-backed projects also stipulate that Japanese companies and workers must be hired to work on them, reflecting the government’s policies to “proactively support” and “facilitate” the overseas expansion of Japanese business using aid.
Documents show that rail projects in India and the Philippines were granted on this basis.
This practice can be beneficial, especially in sectors such as rail infrastructure, where Japanese companies have considerable expertise. Yet, analysts have questioned Japan’s approach, which they argue can disproportionately benefit the donor itself.
“Counting these loans as climate finance presents a moral hazard…And such loans tied to Japanese businesses make it worse,” Yuri Onodera, a climate specialist at Friends of the Earth Japan, tells Carbon Brief.
There was funding for more than 500 clean-power projects in African countries
Around 730 million people still lack access to electricity, with roughly 80% of those people living in sub-Saharan Africa.
As part of their climate-finance pledges, donor countries often support renewable projects, transmission lines and other initiatives that can provide clean power to those in need.
Carbon Brief and the Guardian have identified funding for more than 500 clean-power and transmission projects in African countries that lack universal electricity access. In total, these funds amounted to $7.6bn over the two years 2021-22.
Among them was support for Chad’s first-ever solar project, a new hydropower plant in Mozambique and the expansion of electricity grids in Nigeria.
The distribution of funds across the continent – excluding multi-country programmes – can be seen in the map below.
A lack of clear rules about what can be classified as “climate finance” in the UN climate process means donors sometimes include support for fossil fuels – particularly gas power – in their totals.
For example, Japan counted an $18m loan to a Japanese liquified natural gas (LNG) company in Senegal and roughly $1m for gas projects in Tanzania.
However, such funding accounted for a tiny fraction of sub-Saharan Africa’s climate finance overall, amounting to less than 1% of all power-sector funding across the region, based on the projects identified in this analysis.
Some ‘least developed’ countries relied heavily on loans
One of the most persistent criticisms levelled at climate finance by developing-country governments and civil society groups is that so much of it is provided in the form of loans.
While loans are commonly used to fund major projects, they are sometimes offered on unfavourable terms and add to the burden of countries that are already struggling with debt.
The International Institute for Environment and Development (IIED) has shown that the 44 “least developed countries” (LDCs) spend twice as much servicing debts as they receive in climate finance.
Developed nations pledged $33.4bn in 2021 and 2022 to the 44 LDCs to help them finance climate projects. In total, $17.2bn – more than half of the funding – was provided as loans, primarily from Japan, France and development banks.
The chart below shows how, for a number of LDCs, loans continue to be the main way in which they receive international climate funds.
For example, Angola received $216.7m in loans from France – primarily to support its water infrastructure – and $571.6m in loans from various multilateral institutions, together amounting to nearly all the nation’s climate finance over this period.
Oxfam, which describes developed countries as “unjustly indebting poor countries” via loans, estimates that the “true value” of climate finance in 2022 was $28-35bn, roughly a quarter of the OECD’s estimate. This is largely due to Oxfam discounting much of the value of loans.
However, Jan Kowalzig, a senior policy adviser at Oxfam Germany, tells Carbon Brief that, “generally, LDCs receive loans at better conditions” than they would have been able to secure on the open market, sometimes referred to as “concessional” loans.
US shares in development banks significantly raised its total contribution
The US has been one of the world’s top climate-finance providers, accounting for around 15% of all bilateral and multilateral contributions in 2021 and 2022.
Despite this, US contributions have consistently been viewed as relatively low when considering the nation’s wealth and historical role in driving climate change.
Moreover, much of the climate finance that can be attributed to the US comes from its MDB shareholdings, rather than direct contributions from its aid budget.
These banks are owned by member countries and the US is a dominant shareholder in many of them.
The analysis reveals that around three-quarters of US climate finance provided in 2021-22 came via multilateral sources, particularly the World Bank. (For information on how this analysis attributes multilateral funding to donors, see Methodology.)
Among other major donors – specifically Japan, France and Germany – only a third of their finance was channelled through multilateral institutions. As the chart below shows, multilateral contributions lifted the US from being the fifth-largest donor to the third-largest.
While the Trump administration has cut virtually all overseas climate funding and broadly rejected multilateral institutions, the US has not yet abandoned its influential stake in MDBs.
Prior to COP29 in 2024, only MDB funds that could be attributed to developed country inputs were counted towards the $100bn goal, as part of those nations’ Paris Agreement duties.
However, countries have now agreed that “all climate-related outflows” from MDBs – no matter which donor country they are attributed to – will count towards the new $300bn goal.
This means that, as long as MDBs continue extensively funding climate projects, there will still be a large slice of climate finance that can be attributed to the US, even as it exits the Paris Agreement.
Adaptation finance still lags, but climate-vulnerable countries received more
Under the Paris Agreement, developed countries committed to achieving “a balance between adaptation and mitigation” in their climate finance.
The idea is that, while it is important to focus on mitigation – or cutting emissions – by supporting projects such as clean energy, there is also a need to help developing countries prepare for the threat of climate change.
Generally, adaptation projects are less likely to provide a return on investment and are, therefore, more reliant on grant-based finance.
In practice, a “balance” between adaptation and mitigation has never been reached. Over the period of this analysis, 58% of climate finance was for mitigation, 33% was for adaptation and the remainder was for projects that contributed to both goals.
This reflects a preference for mitigation-based financing via loans among some major donors, particularly Japan and France. Both countries provided just a third of their finance for adaptation projects in 2021 and 2022.
However, among some of the most climate-vulnerable countries – including land-locked parts of Africa and small islands – most funding was for adaptation, as the chart below shows.
Among the projects receiving climate-adaptation funds were those supporting sustainable agriculture in Niger, improving disaster resilience in Micronesia and helping those in Somalia who have been internally displaced by “climate change and food crises”.
Methodology
The joint Guardian and Carbon Brief analysis of climate finance includes the bilateral and multilateral public finance that developed countries pledged for climate projects in developing countries. It covers the years 2021 and 2022.
(These “developed” countries are the 23 “Annex II” nations, plus the EU, that are obliged to provide climate finance under the Paris Agreement.)
The analysis excludes other types of funding that contribute to the $100bn climate-finance target for climate projects, such as export credits and private finance “mobilised” by public investments. Where these have been referenced, the figures are OECD estimates. They are excluded from the analysis because export credits are a small fraction of the total, while private finance mobilised cannot be attributed to specific donor countries.
Data for bilateral funding comes from the biennial transparency reports (BTRs) each country submits to the UNFCCC. The lag in official reporting means the most recent figures – published around the end of 2024 and start of 2025 – only go up to 2022.
Many of the bilateral projects recorded by countries do not specify single recipients, but instead mention several countries. These projects have not been included when calculating the amount of finance individual developing countries received, but they are included in the total figures.
The multilateral funding, including projects funded by MDBs and multilateral climate funds, comes from the OECD. Many countries – including developing countries – pay into these institutions, which then use their money to fund climate projects and, in the case of MDBs, raise additional finance from capital markets.
This analysis calculated the shares of the “outflows” from multilateral institutions that can be attributed to developed countries. It adapts the approach used by the OECD to calculate these attributable shares for developed countries as a whole group.
As the OECD does not publish individual donor country shares that make up the total developed-country contribution, this analysis calculated each country’s attributable shares based on shareholdings in MDBs and cumulative contributions to multilateral funds. This was based on a methodology used by analysts at the World Resources Institute and ODI. There were some multilateral funds that could not be assigned using this methodology, which are therefore not captured in each country’s multilateral contribution.
The post Analysis: Seven charts showing how the $100bn climate-finance goal was met appeared first on Carbon Brief.
Analysis: Seven charts showing how the $100bn climate-finance goal was met
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
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.
-
Battle over cleaning up shipping set to resume at London talks
The US and Saudi Arabia want to scrap shipping’s Net-Zero Framework and have swung behind a far less ambitious alternative -
As marine heat breaks records, countries seek ocean roadmap at COP31
Africa and the EU are leading a push for COP31 to deliver a roadmap that lays out measures to protect fast-warming oceans -
Indonesia’s nickel production cuts are not enough to create a sustainable industry
The government is restricting nickel production to push up prices but producing more sustainable nickel for a premium requires addressing the industry’s coal issue
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
-
Climate Change1 year ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases1 year ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases2 years ago嘉宾来稿：满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago嘉宾来稿：满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago
Bill Discounting Climate Change in Florida’s Energy Policy Awaits DeSantis’ Approval
-
Renewable Energy10 months agoSending Progressive Philanthropist George Soros to Prison?
-
Greenhouse Gases1 year ago
嘉宾来稿：探究火山喷发如何影响气候预测
-
Carbon Footprint2 years agoUS SEC’s Climate Disclosure Rules Spur Renewed Interest in Carbon Credits