Wider adoption of heat pumps could accelerate decarbonisation of heating in China’s carbon-intensive buildings and light industry sectors, a report by the International Energy Agency (IEA) says.
The report, published in collaboration with Tsinghua University, finds that, by using heat pumps as part of China’s strategy to reach carbon neutrality by 2060, direct emissions for heating in buildings could fall by 75% to 70m tonnes of carbon dioxide (MtCO2) in 2050, due to increased electrification and improvements to energy efficiency.
Similarly, using heat pumps could help reduce direct emissions from heating in light industries from more than 110MtCO2 today to less than 10MtCO2 in 2050.
In 2023, China was one of the few nations to see total heat pump sales rise. However, greater policy support is still needed to accelerate uptake and help shift the buildings and light industry sectors towards less-carbon intensive energy sources, the report says.
- How much energy does China consume for heat?
- How can heat pumps help China meet its ‘dual carbon’ goals?
- How effective are heat pumps as a solution for China?
- How can policy support heat pump adoption?
How much energy does China consume for heat?
China’s final energy consumption was 107 exajoules (EJ) of energy in 2022. Within this, the IEA report says, heat consumption reached about 50EJ. China’s heat consumption equals “about one-third” of total heat consumption globally.
Around a quarter of China’s heat use is in buildings, with the remainder in industry.
In the buildings sector, heat consumption has grown faster in China than in any other country over the past decade, standing at 12EJ in 2022. This is largely due to growing demand for heat for space and water, which has “nearly tripled” direct and indirect emissions since 2000.
Since 2010, direct coal consumption for heating overall has fallen by 15%. The IEA report attributes this to policy drives beginning in the mid-2010s, initially “to improve air quality, then later to expand clean and low-carbon heating”.
However, an exception to this is district heating, namely, a centralised heating mechanism that is the dominant source of heat for urban areas in northern China. Heat pumps and other decentralised solutions are more common in southern and rural northern China.
District heating networks in northern China rely on coal for more than 80% of their heat production. It is the key driver of coal consumption in building heat provision across the country, according to the IEA.
One 2019 study found that China’s emissions from district heating alone were greater than the total CO2 emissions of the UK.
Dr Chiara Delmastro and Dr Rafael Martinez Gordon, the report’s lead authors, tell Carbon Brief:
“[This] was mostly driven by the expansion of [heat] networks in north urban China, in particular…The length of the district heat network has increased by 250% since 2010, of which the large majority is in the north.”
Delmastro and Martinez Gordon also note, however, that “China has taken action towards cleaner and more efficient heating in recent years” – for example, by shifting from using coal-fired boilers to more efficient combined heat and power plants.
Meanwhile, heat consumption for industry in 2022 totalled 38EJ. Some of this demand is for low- and medium-temperature heat (below 200C), which is generally required for light industries, as well as the pulp and paper sector and some chemical sector processes.
This demand – which could easily be served by existing state-of-the-art heat pump technology – totaled 4.7EJ in 2022 and released more than 110MtCO2 of direct emissions, the report says.
However, more than 80% of industrial demand for heat requires temperatures above 200C, predominantly for iron and steel manufacturing. Other industries that require such high temperatures include non-metallic minerals and non-ferrous metals, as well as some processes in the chemicals and petrochemicals and pulp and paper sectors. These sectors comprised the majority of industrial heat demand, consuming 33EJ in 2022.
How can heat pumps help China meet its ‘dual carbon’ goals?
Heat demand in buildings and industry in China is largely driven by coal and accounts for 40% of both China’s coal consumption and its CO2 emissions.
The IEA does note, however, that the use of coal for heat has reduced slightly, largely due to “policies to improve air quality, reduce CO2 emissions and maximise energy efficiency”.
In 2022, carbon emissions from space and water heating accounted for the vast majority of direct emissions from buildings in China, around 290MtCO2, while direct emissions from heating for light industry totalled 110MtCO2. The IEA places China’s total carbon emissions at 12,135MtCO2 in 2022.
The report provides estimates of the uptake of heat pumps in China under the “announced pledges scenario” (APS), in which governments are given the benefit of the doubt and assumed to meet all of their climate goals on time and in full.
It also looks at uptake under the “stated policies scenario” (STEPS), reflecting the IEA’s own judgement of where government policy is currently heading.
If China upholds its “dual carbon” commitments, in line with the APS, then the IEA estimates that heat pump capacity in buildings would rise to 1,400 gigawatts (GW) in 2050, meeting one-quarter of China’s heat demand for the sector.
Under the APS, China would install 100GW in buildings each year until 2050 – the equivalent of “the capacity deployed in the US, China and the EU in 2022 combined”.
Emissions from buildings heat would fall from 290MtCO2 to 80MtCO2 in 2050, a reduction of 210MtCO2, with heat pumps accounting for 30% of this decrease. The other drivers for building decarbonisation would include greater adoption of electrification, energy efficiency measures and behaviour changes.
For light industry, under the APS, approximately 1.5GW of heat pumps would be installed annually between 2025 and 2050, meeting one-fifth of heat demand in 2050.
This would contribute to “drastically” reducing carbon emissions, which would fall by 95% overall from more than 110MtCO2 to 10MtCO2. Electrification, including through use of heat pumps, would be responsible for 70% of these emissions reductions.
The report adds that two energy-intensive sectors could be well-suited to using heat pumps: the pulp and paper sector, in which around 55% of current heat demand could be provided by industrial heat pumps, and the chemical sector, for which around 18% of demand could be met.
Heat pumps would be unlikely to serve demand for other energy-intensive sectors, however, as “only a few early-stage prototypes exist for temperatures beyond 200C, all of which are far from being ready for the mass market”.
Even under the STEPS, the stock of heat pumps in buildings in China would double, reaching more than 1,100GW by 2050 and contributing to building emissions falling by more than 25%, with fuel-switching options such as coal-to-gas also playing a role.
For light industries, heat pump-led CO2 emissions reductions under STEPs would “remain limited”, as under the current policy settings, heat pumps may be “deployed slowly”. Overall, by 2050 heat-related emissions would only fall by 15%.
Significantly, the policies required to meet climate goals in China – and the rest of the world – under the APS would see some industries “strongly mobilised”, the report says. Sectors such as mining and machinery would need to expand, ramping up clean-energy technology production to meet domestic and global demand.
While this additional industrial activity would raise China’s heat demand by 5% in the APS compared with the STEPS, the associated emissions would be more than offset by the savings enabled by wider deployment of electrification and clean heating technologies.
Moreover, the deployment of heat pumps would allow for a 20% decline in the energy intensity of heat supply by 2050 – the energy demand per unit of heat – compared to today, the report says.
The alignment between expanded heat pump use and decarbonisation of the electricity system could see indirect emissions from power generation for heat drop by more than 40% by 2030 as more renewable and nuclear power comes online, it adds. By 2050, electricity’s share in heat generation could exceed 75%.
For example, the IEA states that the pulp and paper sector could see coal use “almost entirely phased out by 2050”, if China’s climate goals are met. The sector has already cut the share of coal in its energy needs from 43% in 2010 to 10% in 2022, due to electrification and coal-to-gas shifts.
Under the APS, direct coal use for space and water heating in China would fall by 75% by 2030 and would be “almost completely phased out” by 2040, with heat pumps becoming a key technology for heating in urban and rural areas by 2050.
However, significant investment would be needed in this scenario to deploy enough heat pumps to meet demand.
How effective are heat pumps as a solution for China?
With more than 250GW of installed heat pump capacity in buildings in 2023, China accounts for more than 25% of global heat pump sales and was the only major market to see heat pump sales grow in 2023, the report says. In 2022, 8% of all heating equipment sales for buildings in China were heat pumps.
They are “already the norm” for space heating and cooling in buildings in some parts of central and southern China, which do not benefit from centralised district heating. Rural areas are now seeing a growing uptake of heat pumps, due to policy support to encourage rural regions to limit coal consumption, the report adds.
The same is also true for district heating, where network operators are increasingly installing heat pumps. While the majority are “air-source” pumps operating at relatively low temperatures, some networks are beginning to use large-scale heat pumps that recycle waste heat from steel mills, sewage treatment processes and coal chemical plants.
They “offer one of the most efficient options for decarbonising heat in district heating networks, buildings and industry”, according to the report.
In terms of both direct and indirect emissions, annual carbon emissions from a heat pump currently installed in China are more than 30% lower than those from gas boilers. “Shifting from fossil fuel boilers to heat pumps”, the report says, “would reduce CO2 emissions virtually everywhere they are installed”.
Despite high upfront installation costs, heat pumps also help users save money on energy bills over their lifetimes, according to the IEA.
The image below shows the different climate zones across China. Air-to-air heat pumps are more cost-effective than both gas boilers and electric heaters in some colder climates, as well as in regions with hot summers and cold winters.
Air-to-water heat pumps save money over electric heaters, although they are only less expensive than gas boilers in areas with competitive electricity prices compared to gas.
Heat pump use in energy-intensive industries is less viable, as current technologies to generate temperatures above 200C are still largely under development.
However, for light industries, industrial heat pumps are “far cheaper” than gas and electric boilers and nearly cost-competitive with coal boilers over their lifetimes, due to their high efficiency levels, states the report.
Despite this, uptake is not widespread, due to high upfront installation costs and lack of public awareness of the effectiveness of heat pumps.
Delmastro and Martinez Gordon tell Carbon Brief:
“In certain processes alternative technologies [to heat pumps] might be less costly and more appropriate, and – depending on policy decisions – different levels of heat pump deployment may be stimulated. However, to meet China’s carbon neutrality goal, we estimate that heat pumps need to supply at least 20% of heat demand in light industries by 2050.”
The report adds that state-of-the-art heat pumps – heat pump technology that is either newly-released or close to release – are well-placed to meet heat consumption needs in the building sectors and light industry sectors, and could theoretically supply about 40% of demand.
In addition, China currently wastes heat resources that could be redirected via heat pumps. In 2021, it generated 45EJ of waste heat resources – almost equal to the combined heating demand of buildings and industry – from sources such as nuclear power plants, other power plants, industrial activity, data centres and wastewater, according to the report.
How can policy support heat pump adoption?
Heat pumps have “increasingly featured” in China’s national-level energy and climate policy as one aspect of the energy transition. For instance, the 14th “five-year plan” for a modern energy system (2021-2025) calls for the expansion of clean heating provision for end-users as part of its electrification drive.
However, Delmastro and Martinez Gordon explain that the more targeted, practical policy recommendations in the IEA report “should [fall] under the umbrella of a clear national action plan for heating decarbonisation, which is missing now in China”.
This would allow China to set quantitative targets for heat pump use that would provide a clear signal to markets and promote wider investment in R&D, manufacturing and deployment.
Meanwhile, the report suggests that more stringent performance requirements for new buildings, stronger energy performance benchmarks, inclusion of heat pump installation requirements in building codes and extension of the scope of the national emissions trading scheme (ETS) to include industry could all drive heat pump adoption.
Loans, tax credits and other financial support mechanisms could address consumer reluctance to pay high upfront installation costs, adds the report.
The northern city of Tianjin offered grants of 25,000 yuan ($3,700) for air-source heat pump purchases, but this is not a common practice – particularly in urban regions.
Raising awareness of the benefits of industrial heat pumps and reducing electricity costs for industry could accelerate uptake in light industry, the report says.
Electricity pricing incentives have already seen rural residential areas switch from using coal to using gas for heating. Similar incentives for electricity in rural parts of Beijing, as well as subsidies for installing heat pumps, mean that heat pumps are now the cheapest heating option for households in that region, based on IEA calculations.
Expanding this policy nationwide could “further increase the competitiveness of heat pumps in regions where electricity currently costs significantly more than gas”, the report states.
Other measures that could make heat pumps more attractive to consumers include combining heat pumps with solar panels or solar thermal solutions, plus adapting the power system to provide tiered electricity pricing and time-of-use power market measures.
Finally, more recovery of waste energy resources, combined with thermal energy storage technologies, could “optimise heat supply by transforming surplus electricity…into heat and storing it for use during the winter heating”, the report says.
“In northern Hebei, for example”, it adds, “heat recovered by heat pumps from renewable power and waste heat could account for 80% of the district heat supply during winter in 2050”.
The post Heat pumps could help cut China’s building CO2 emissions by 75%, says IEA appeared first on Carbon Brief.
Heat pumps could help cut China’s building CO2 emissions by 75%, says IEA
Greenhouse Gases
DeBriefed 15 August 2025: Raging wildfires; Xi’s priorities; Factchecking the Trump climate report
Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Blazing heat hits Europe
FANNING THE FLAMES: Wildfires “fanned by a heatwave and strong winds” caused havoc across southern Europe, Reuters reported. It added: “Fire has affected nearly 440,000 hectares (1,700 square miles) in the eurozone so far in 2025, double the average for the same period of the year since 2006.” Extreme heat is “breaking temperature records across Europe”, the Guardian said, with several countries reporting readings of around 40C.
HUMAN TOLL: At least three people have died in the wildfires erupting across Spain, Turkey and Albania, France24 said, adding that the fires have “displaced thousands in Greece and Albania”. Le Monde reported that a child in Italy “died of heatstroke”, while thousands were evacuated from Spain and firefighters “battled three large wildfires” in Portugal.
UK WILDFIRE RISK: The UK saw temperatures as high as 33.4C this week as England “entered its fourth heatwave”, BBC News said. The high heat is causing “nationally significant” water shortfalls, it added, “hitting farms, damaging wildlife and increasing wildfires”. The Daily Mirror noted that these conditions “could last until mid-autumn”. Scientists warn the UK faces possible “firewaves” due to climate change, BBC News also reported.
Around the world
- GRID PRESSURES: Iraq suffered a “near nationwide blackout” as elevated power demand – due to extreme temperatures of around 50C – triggered a transmission line failure, Bloomberg reported.
- ‘DIRE’ DOWN UNDER: The Australian government is keeping a climate risk assessment that contains “dire” implications for the continent “under wraps”, the Australian Financial Review said.
- EXTREME RAINFALL: Mexico City is “seeing one of its heaviest rainy seasons in years”, the Washington Post said. Downpours in the Japanese island of Kyushu “caused flooding and mudslides”, according to Politico. In Kashmir, flash floods killed 56 and left “scores missing”, the Associated Press said.
- SOUTH-SOUTH COOPERATION: China and Brazil agreed to “ensure the success” of COP30 in a recent phone call, Chinese state news agency Xinhua reported.
- PLASTIC ‘DEADLOCK’: Talks on a plastic pollution treaty have failed again at a summit in Geneva, according to the Guardian, with countries “deadlocked” on whether it should include “curbs on production and toxic chemicals”.
15
The number of times by which the most ethnically-diverse areas in England are more likely to experience extreme heat than its “least diverse” areas, according to new analysis by Carbon Brief.
Latest climate research
- As many as 13 minerals critical for low-carbon energy may face shortages under 2C pathways | Nature Climate Change
- A “scoping review” examined the impact of climate change on poor sexual and reproductive health and rights in sub-Saharan Africa | PLOS One
- A UK university cut the carbon footprint of its weekly canteen menu by 31% “without students noticing” | Nature Food
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
Factchecking Trump’s climate report
A report commissioned by the US government to justify rolling back climate regulations contains “at least 100 false or misleading statements”, according to a Carbon Brief factcheck involving dozens of leading climate scientists. The report, compiled in two months by five hand-picked researchers, inaccurately claims that “CO2-induced warming might be less damaging economically than commonly believed” and misleadingly states that “excessively aggressive [emissions] mitigation policies could prove more detrimental than beneficial”80
Spotlight
Does Xi Jinping care about climate change?
This week, Carbon Brief unpacks new research on Chinese president Xi Jinping’s policy priorities.
On this day in 2005, Xi Jinping, a local official in eastern China, made an unplanned speech when touring a small village – a rare occurrence in China’s highly-choreographed political culture.
In it, he observed that “lucid waters and lush mountains are mountains of silver and gold” – that is, the environment cannot be sacrificed for the sake of growth.
(The full text of the speech is not available, although Xi discussed the concept in a brief newspaper column – see below – a few days later.)
In a time where most government officials were laser-focused on delivering economic growth, this message was highly unusual.
Forward-thinking on environment
As a local official in the early 2000s, Xi endorsed the concept of “green GDP”, which integrates the value of natural resources and the environment into GDP calculations.
He also penned a regular newspaper column, 22 of which discussed environmental protection – although “climate change” was never mentioned.
This focus carried over to China’s national agenda when Xi became president.
New research from the Asia Society Policy Institute tracked policies in which Xi is reported by state media to have “personally” taken action.
It found that environmental protection is one of six topics in which he is often said to have directly steered policymaking.
Such policies include guidelines to build a “Beautiful China”, the creation of an environmental protection inspection team and the “three-north shelterbelt” afforestation programme.
“It’s important to know what Xi’s priorities are because the top leader wields outsized influence in the Chinese political system,” Neil Thomas, Asia Society Policy Institute fellow and report co-author, told Carbon Brief.
Local policymakers are “more likely” to invest resources in addressing policies they know have Xi’s attention, to increase their chances for promotion, he added.
What about climate and energy?
However, the research noted, climate and energy policies have not been publicised as bearing Xi’s personal touch.
“I think Xi prioritises environmental protection more than climate change because reducing pollution is an issue of social stability,” Thomas said, noting that “smoggy skies and polluted rivers” were more visible and more likely to trigger civil society pushback than gradual temperature increases.
The paper also said topics might not be linked to Xi personally when they are “too technical” or “politically sensitive”.
For example, Xi’s landmark decision for China to achieve carbon neutrality by 2060 is widely reported as having only been made after climate modelling – facilitated by former climate envoy Xie Zhenhua – showed that this goal was achievable.
Prior to this, Xi had never spoken publicly about carbon neutrality.
Prof Alex Wang, a University of California, Los Angeles professor of law not involved in the research, noted that emphasising Xi’s personal attention may signal “top” political priorities, but not necessarily Xi’s “personal interests”.
By not emphasising climate, he said, Xi may be trying to avoid “pushing the system to overprioritise climate to the exclusion of the other priorities”.
There are other ways to know where climate ranks on the policy agenda, Thomas noted:
“Climate watchers should look at what Xi says, what Xi does and what policies Xi authorises in the name of the ‘central committee’. Is Xi talking more about climate? Is Xi establishing institutions and convening meetings that focus on climate? Is climate becoming a more prominent theme in top-level documents?”
Watch, read, listen
TRUMP EFFECT: The Columbia Energy Exchange podcast examined how pressure from US tariffs could affect India’s clean energy transition.
NAMIBIAN ‘DESTRUCTION’: The National Observer investigated the failure to address “human rights abuses and environmental destruction” claims against a Canadian oil company in Namibia.
‘RED AI’: The Network for the Digital Economy and the Environment studied the state of current research on “Red AI”, or the “negative environmental implications of AI”.
Coming up
- 17 August: Bolivian general elections
- 18-29 August: Preparatory talks on the entry into force of the “High Seas Treaty”, New York
- 18-22 August: Y20 Summit, Johannesburg
- 21 August: Advancing the “Africa clean air programme” through Africa-Asia collaboration, Yokohama
Pick of the jobs
- Lancaster Environment Centre, senior research associate: JUST Centre | Salary: £39,355-£45,413. Location: Lancaster, UK
- Environmental Justice Foundation, communications and media officer, Francophone Africa | Salary: XOF600,000-XOF800,000. Location: Dakar, Senegal
- Politico, energy & climate editor | Salary: Unknown. Location: Brussels, Belgium
- EnviroCatalysts, meteorologist | Salary: Unknown. Location: New Delhi, India
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.
The post DeBriefed 15 August 2025: Raging wildfires; Xi’s priorities; Factchecking the Trump climate report appeared first on Carbon Brief.
DeBriefed 15 August 2025: Raging wildfires; Xi’s priorities; Factchecking the Trump climate report
Greenhouse Gases
Cropped 13 August 2025: Fossil-fuelled bird decline; ‘Deadly’ wildfires; Empty nature fund
We handpick and explain the most important stories at the intersection of climate, land, food and nature over the past fortnight.
This is an online version of Carbon Brief’s fortnightly Cropped email newsletter. Subscribe for free here.
Key developments
‘Deadly’ wildfires
WINE BRAKE: France experienced its “largest wildfire in decades”, which scorched more than 16,000 hectares in the country’s southern Aude region, the Associated Press said. “Gusting winds” fanned the flames, Reuters reported, but local winemakers and mayors also “blam[ed] the loss of vineyards”, which can act as a “natural, moisture-filled brake against wildfires”, for the fire’s rapid spread. It added that thousands of hectares of vineyards were removed in Aude over the past year. Meanwhile, thousands of people were evacuated from “deadly” wildfires in Spain, the Guardian said, with blazes ongoing in other parts of Europe.
MAJOR FIRES: Canada is experiencing its second-worst wildfire season on record, CBC News reported. More than 7.3m hectares burned in 2025, “more than double the 10-year average for this time of year”, the broadcaster said. The past three fire seasons were “among the 10 worst on record”, CBC News added. Dr Mike Flannigan from Thompson Rivers University told the Guardian: “This is our new reality…The warmer it gets, the more fires we see.” Elsewhere, the UK is experiencing a record year for wildfires, with more than 40,000 hectares of land burned so far in 2025, according to Carbon Brief.
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Sign up to Carbon Brief’s free “Cropped” email newsletter. A fortnightly digest of food, land and nature news and views. Sent to your inbox every other Wednesday.
WESTERN US: The US state of Colorado has recorded one of its largest wildfires in history in recent days, the Guardian said. The fire “charred” more than 43,300 hectares of land and led to the temporary evacuation of 179 inmates from a prison, the newspaper said. In California, a fire broke out “during a heatwave” and burned more than 2,000 hectares before it was contained, the Los Angeles Times reported. BBC News noted: “Wildfires have become more frequent in California, with experts citing climate change as a key factor. Hotter, drier conditions have made fire seasons longer and more destructive.”
FIRE FUNDING: “Worsening fires” in the Brazilian Amazon threaten new rainforest funding proposals due to be announced at the COP30 climate summit later this year, experts told Climate Home News. The new initiatives include the Tropical Forests Forever Facility, which the outlet said “aims to generate a flow of international investment to pay countries annually in proportion to their preserved tropical forests”. The outlet added: “If fires in the Amazon continue to worsen in the years to come, eligibility for funding could be jeopardised, Brazil’s environment ministry acknowledged.”
Farming impacts
OUT OF ORBIT: US president Donald Trump moved to “shut down” two space missions which monitor carbon dioxide and plant health, the Associated Press reported. Ending these NASA missions would “potentially shu[t] off an important source of data for scientists, policymakers and farmers”, the outlet said. Dr David Crisp, a retired NASA scientist, said the missions can detect the “glow” of plant growth, which the outlet noted “helps monitor drought and predict food shortages that can lead to civil unrest and famine”.
FARM EXTREMES: Elsewhere, Reuters said that some farmers are considering “abandoning” a “drought-hit” agricultural area in Hungary as “climate change cuts crop yields and reduces groundwater levels”. Scientists warned that rising temperatures and low rainfall threaten the region’s “agricultural viability”, the newswire added. Meanwhile, the Premium Times in Nigeria said that some farmers are “harvest[ing] crops prematurely” due to flooding fears. A community in the south-eastern state of Imo “has endured recurrent floods, which wash away crops and incomes alike” over the past decade, the newspaper noted.
SECURITY RISKS: Food supply chains in the UK face “escalating threats from climate impacts and the migration they are triggering”, according to a report covered by Business Green. The outlet said that £3bn worth of UK food imports originated from the 20 countries “with the highest numbers of climate-driven displacements” in 2024, based on analysis from the Energy and Climate Intelligence Unit. The analysis highlighted that “climate impacts on food imports pose a threat to UK food security”. Elsewhere, an opinion piece in Dialogue Earth explored how the “role of gender equity in food security remains critically unaddressed”.
Spotlight
Fossil-fuelled bird decline
This week, Carbon Brief covers a new study tracing the impact of fossil-fuelled climate change on tropical birds.
Over the past few years, biologists have recorded sharp declines in bird numbers across tropical rainforests – even in areas untouched by humans – with the cause remaining a mystery.
A new study published this week in Nature Ecology and Evolution could help to shed light on this alarming phenomenon.
The research combined ecological and climate attribution techniques for the first time to trace the fingerprint of fossil-fuelled climate change on declining bird populations.
It found that an increase in heat extremes driven by climate change has caused tropical bird populations to decline by 25-38% in the period 1950-2020, when compared to a world without warming.
In their paper, the authors noted that birds in the tropics could be living close to their “thermal limits”.
Study lead author Dr Maximilian Kotz, a climate scientist at the Barcelona Supercomputing Center in Spain, explained to Carbon Brief:
“High temperature extremes can induce direct mortality in bird populations due to hyperthermia and dehydration. Even when they don’t [kill birds immediately], there’s evidence that this can then affect body condition which, in turn, affects breeding behaviour and success.”
Conservation implications
The findings have “potential ramifications” for commonly proposed conservation strategies, such as increasing the amount of land in the tropics that is protected for nature, the authors said. In their paper, they continued:
“While we do not disagree that these strategies are necessary for abating tropical habitat loss…our research shows there is now an additional urgent need to investigate strategies that can allow for the persistence of tropical species that are vulnerable to heat extremes.”
In some parts of the world, scientists and conservationists are looking into how to protect wildlife from more intense and frequent climate extremes, Kotz said.
He referenced one project in Australia which is working to protect threatened wildlife following periods of extreme heat, drought and bushfires.
Prof Alex Pigot, a biodiversity scientist at University College London (UCL), who was not involved in the research, said the findings reinforced the need to systematically monitor the impact of extreme weather on wildlife. He told Carbon Brief:
“We urgently need to develop early warning systems to be able to anticipate in advance where and when extreme heatwaves and droughts are likely to impact populations – and also rapidly scale up our monitoring of species and ecosystems so that we can reliably detect these effects.”
There is further coverage of this research on Carbon Brief’s website.
News and views
EMPTY CALI FUND: A major voluntary fund for biodiversity remains empty more than five months after its launch, Carbon Brief revealed. The Cali Fund, agreed at the COP16 biodiversity negotiations last year, was set up for companies who rely on nature’s resources to share some of their earnings with the countries where many of these resources originate. Big pharmaceutical companies did not take up on opportunities to commit to contributing to the fund or be involved in its launch in February 2025, emails released to Carbon Brief showed. Just one US biotechnology firm has pledged to contribute to the fund in the future.
LOSING HOPE: Western Australia’s Ningaloo reef – long considered a “hope spot” among the country’s coral reefs for evading major bleaching events – is facing its “worst-ever coral bleaching”, Australia’s ABC News reported. The ocean around Ningaloo has been “abnormally” warm since December, resulting in “unprecedented” bleaching and mortality, a research scientist told the outlet. According to marine ecologist Dr Damian Thomson, “up to 50% of the examined coral was dead in May”, the Sydney Morning Herald said. Thomson told the newspaper: “You realise your children are probably never going to see Ningaloo the way you saw it.”
‘DEVASTATION BILL’: Brazil’s president, Luiz Inácio Lula da Silva, signed a “contentious” environmental bill into law, but “partially vetoed” some of the widely criticised elements, the Financial Times reported. Critics, who dubbed it the “devastation bill”, said it “risked fuelling deforestation and would harm Brazil’s ecological credentials” just months before hosting the COP30 climate summit. The newspaper said: “The leftist leader struck down or altered 63 of 400 provisions in the legislation, which was designed to speed up and modernise environmental licensing for new business and infrastructure developments.” The vetoes need to be approved by congress, “where Lula lacks a majority”, the newspaper noted.
RAINFOREST DRILLING: The EU has advised the Democratic Republic of the Congo (DRC) against allowing oil drilling in a vast stretch of rainforest and peatland that was jointly designated a “green corridor” earlier this year, Climate Home News reported. In May, the DRC announced that it planned to open the conservation area for drilling, the publication said. A spokesperson for the European Commission told Climate Home News that the bloc “fully acknowledges and respects the DRC’s sovereign right to utilise its diverse resources for economic development”, but that it “highlights the fact that green alternatives have facilitated the protection of certain areas”.
NEW PLAN FOR WETLANDS: During the 15th meeting of the Ramsar Convention on Wetlands, held in Zimbabwe from 23 to 31 July, countries agreed on the adoption of a new 10-year strategic plan for conserving and sustainably using the world’s wetlands. Down to Earth reported that 13 resolutions were adopted, including “enhancing monitoring and reporting, capacity building and mobilisation of resources”. During the talks, Zimbabwe’s environment minister announced plans to restore 250,000 hectares of degraded wetlands by 2030 and Saudi Arabia entered the Convention on Wetlands. Panamá will host the next COP on wetlands in July 2028.
MEAT MADNESS: DeSmog covered the details of a 2021 public relations document that revealed how the meat industry is trying to “make beef seem climate-friendly”. The industry “may have enlisted environmental groups to persuade people to ‘feel better’ about eating beef”, the outlet said, based on this document. The strategy was created by a communications agency, MHP Group, and addressed to the Global Roundtable for Sustainable Beef. One of the key messages of the plan was to communicate the “growing momentum in the beef industry to protect and nurture the Earth’s natural resources”. MHP Group did not respond to a request for comment, according to DeSmog.
Watch, read, listen
MAKING WAVES: A livestream of deep-sea “crustaceans, sponges and sea cucumbers” has “captivated” people in Argentina, the New York Times outlined.
BAFFLING BIRDS: The Times explored the backstory to the tens of thousands of “exotic-looking” parakeets found in parks across Britain.
PLANT-BASED POWER: In the Conversation, Prof Paul Behrens outlined how switching to a plant-based diet could help the UK meet its climate and health targets.
MARINE DISCRIMINATION: Nature spoke to a US-based graduate student who co-founded Minorities in Shark Science about her experiences of racism and sexism in the research field.
New science
- Applying biochar – a type of charcoal – to soils each year over a long period of time can have “sustained benefits for crop yield and greenhouse gas mitigation”, according to a Proceedings of the National Academy of Sciences study.
- New research, published in PLOS Climate, found that nearly one-third of highly migratory fish species in the US waters of the Atlantic Ocean have “high” or “very high” vulnerability to climate change, but the majority of species have “some level of resilience and adaptability”.
- A study in Communications Earth & Environment found a “notable greening trend” in China’s wetlands over 2000-23, with an increasing amount of carbon being stored in the plants growing there.
In the diary
- 18-29 August: Second meeting of the preparatory commission for the Agreement on Marine Biological Diversity of Areas beyond National Jurisdiction | New York
- 24-28 August: World Water Week | Online and Stockholm, Sweden
- 26-29 August: Sixth forum of ministers and environment authorities of Asia Pacific | Nadi, Fiji
Cropped is researched and written by Dr Giuliana Viglione, Aruna Chandrasekhar, Daisy Dunne, Orla Dwyer and Yanine Quiroz. Please send tips and feedback to cropped@carbonbrief.org
The post Cropped 13 August 2025: Fossil-fuelled bird decline; ‘Deadly’ wildfires; Empty nature fund appeared first on Carbon Brief.
Cropped 13 August 2025: Fossil-fuelled bird decline; ‘Deadly’ wildfires; Empty nature fund
CCL submits a formal comment on EPA’s proposed endangerment finding rollback
By Dana Nuccitelli, CCL Research Manager
On July 29, the EPA proposed to rescind its 2009 endangerment finding that forms the basis of all federal climate pollution regulations.
Without the endangerment finding, the EPA may not be allowed or able to regulate greenhouse gas pollution from sources like power plants or vehicle tailpipes, as they have done for years. News coverage has framed this as a “radical transformation” and a “bid to scrap almost all pollution regulations,” so it has appropriately alarmed many folks in the climate and environment space.
At CCL, we focus our efforts on working with Congress to implement durable climate policies, and so we don’t normally take actions on issues like this that relate to federal agencies or the courts. Other organizations focus their efforts on those branches of the government and are better equipped to spearhead this type of moment, and we appreciate those allies.
But in this case, we did see an opportunity for CCL’s voice — and our focus on Congress — to play a role here. We decided to submit a formal comment on this EPA action for two reasons.
First, this decision could have an immense impact by eliminating every federal regulation of climate pollutants in a worst case scenario. Second, this move relates to our work because the EPA is misinterpreting the text and intent of laws passed by Congress. Our representatives have done their jobs by passing legislation over the past many decades that supports and further codifies the EPA’s mandate to regulate climate pollution. That includes the Clean Air Act, and more recently, the Inflation Reduction Act. We at CCL wanted to support our members of Congress by making these points in a formal comment.
There has been a tremendous public response to this action. In just over one week, the EPA already received over 44,000 public comments on its decision, and the public comment period will remain open for another five weeks, until September 15.
To understand more about the details and potential outcomes of the EPA’s actions, read my article on the subject at Yale Climate Connections, our discussion on CCL Community, and CCL’s formal comment, which represents our entire organization. As our comment concludes,
“In its justifications for rescinding the 2009 endangerment finding, the Reconsideration has misinterpreted the text of the Clean Air Act, Congress’ decadeslong support for the EPA’s mandate to regulate greenhouse gas emissions from motor vehicles and other major sources, and the vast body of peer-reviewed climate science research that documents the increasingly dangerous threats that those emissions pose to Americans’ health and welfare. Because the bases of these justifications are fundamentally flawed, CCL urges the EPA to withdraw its ill-conceived Reconsideration of the 2009 endangerment finding. The EPA has both the authority and the responsibility to act. Americans cannot afford a retreat from science, law, and common sense in the face of a rapidly accelerating climate crisis.”
After the EPA responds to the public comment record and finalizes its decision, this issue will ultimately be decided by the Supreme Court several years from now.
In the meantime, CCL will continue to focus our efforts on areas where we can make the biggest difference in preserving a livable climate. Right now, that involves contacting our members of Congress to urge them to fully fund key climate and energy programs and protect critical work at the National Oceanic and Atmospheric Administration (NOAA), National Aeronautics and Space Administration (NASA), and Department of Energy. We’ve set an ambitious goal of sending 10,000 messages to our members of Congress, so let’s all do what CCL does best and make our voices heard on this critical issue.
This action by the EPA also reminds us that federal regulations are fragile. They tend to change with each new administration coming into the White House. Legislation passed by Congress – especially when done on a bipartisan basis – is much more durable. That’s why CCL’s work, as one of very few organizations engaging in nonpartisan advocacy for long-lasting climate legislation, is so critical.
That’s especially true right now when we’re seeing the Trump administration slam shut every executive branch door to addressing climate change. We need Congress to step up now more than ever to implement durable solutions like funding key climate and energy programs, negotiating a new bipartisan comprehensive permitting reform bill, implementing healthy forest solutions like the Fix Our Forests Act, and advancing conversations about policies to put a price on carbon pollution. Those are the kinds of effective, durable, bipartisan climate solutions that CCL is uniquely poised to help become law and make a real difference in preserving a livable climate.
For other examples of how CCL is using our grassroots power to help ensure that Congress stays effective on climate in this political landscape, see our full “Holding the Line on Climate” blog series.
The post Holding the line on climate: EPA appeared first on Citizens' Climate Lobby.
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