Amid a rapidly fracturing geopolitical order, there have been growing calls for China to “step into [the] leadership gap” left by the US on climate change.
While China has resisted such suggestions – at least officially – it has spent much of the past 12 months nurturing its international status as a partner for other countries, in areas ranging from the economy and global governance through to climate change.
President Xi Jinping has maintained a schedule packed with foreign-policy engagements, meeting with world leaders from Russia and India through to the EU.
Moreover, this April he made his first international climate speech since 2021, while attending a meeting on climate and the just transition hosted by Brazil.
As well as underscoring his nation’s ongoing commitment to climate action, Xi’s presence also hinted at the growing coordination between China and Brazil in this area.
More broadly, there is growing recognition of greater alignment between non-western countries – particularly in the global south – in the face of more aggressive US foreign policy.
Analysts note that pressure from the US could push groups such as the BRICS – of which Brazil and China are two founding members, alongside Russia and India – to become more cohesive and develop more concrete cooperation channels.
In a recent interview with Carbon Brief, UK climate envoy Rachel Kyte said that the “world is changing”, becoming “flatter” and that the BRICS – which now includes 11 countries, including South Africa, Egypt and Indonesia – are “more and more important”.
This Q&A explores the membership, climate stance and energy sectors of the BRICS nations, as well as the potential for China and the bloc to lead on climate change.
- What is the BRICS group?
- How do the BRICS approach climate change?
- Are Brazil and China in the BRICS ‘driving seat’?
- What is the role of fossil fuels in the BRICS?
- What is the economic impact of clean-tech?
- Will China and the BRICS emerge as climate leaders?
What is the BRICS group?
The BRICS group represents a number of emerging economies that aim to “strengthen” cooperation amongst themselves and to “increas[e] the influence of global south countries in international governance”.
They coordinate on a range of topics, from international finance to climate diplomacy.
It was founded by Brazil, Russia, India and China – hence, the original name “BRIC” – which later became “BRICS” with the inclusion of South Africa. More recently, it expanded again to include Egypt, the United Arab Emirates, Ethiopia, Indonesia and Iran.
Saudi Arabia has been formally invited to join the bloc, but has not yet accepted the invitation. A number of others participate in the grouping as partner countries, including Malaysia, Thailand and Nigeria.
Together, the full members of the group represent 27% of global gross domestic product (GDP), 49% of the world’s population and 52% of emissions, according to Carbon Brief calculations illustrated below.
Four of the members – Brazil, China, India and South Africa – also form the BASIC bloc, a group with a significant voice at UN climate summits and other negotiations.
BASIC was formed in Beijing in 2009, with representatives from the four countries meeting to coordinate on climate negotiations from the standpoint of major emerging economies.
This culminated at the COP15 climate talks in Copenhagen in 2009, when the BASIC group issued a joint set of “non-negotiable terms” and went on to work directly with the US to agree the Copenhagen Accord.
The bloc has used less combative tactics in subsequent COPs, but it continues to issue joint statements on climate change and to strongly advocate for certain issues.
At both COP28 and COP29, BASIC submitted a proposal to have “unilateral trade measures related to climate change” – referring to policies such as the EU’s carbon border adjustment mechanism (CBAM) – added to the meeting agenda.
The request was denied both times.
How do the BRICS approach climate change?
Alongside BASIC, the BRICS group is also becoming increasingly focused on climate policy.
COP30 executive director Ana Toni, speaking at a September 2025 event at Tsinghua University attended online by Carbon Brief, said that BRICS countries have “realised that climate is not just a financial issue or a niche”, but rather a “pillar for prosperity, development and growth”.
Lucas Carlos Lima, professor of international law at the Federal University of Minas Gerais in Brazil, wrote in an April 2025 article for Modern Diplomacy that recent joint statements show the BRICS had “placed climate change squarely at the centre of the bloc’s agenda”.
The group has also been playing an increasingly significant role in other multilateral fora. For example, a BRICS proposal at the COP16 UN biodiversity negotiations in February formed the basis of an agreement to mobilise at least $200bn per year to protect nature.
Susana Muhamad, president of the COP16 nature talks, told Reuters in March that BRICS nations had been “bridge builders” in the negotiations.
She added:
“I understand there’s a lot of countries wanting to join BRICS, because…if you have to confront something like the US, you are not alone.”
Environment ministers of BRICS countries also recently issued a joint statement that “reaffirm[ed] our steadfast commitments” to addressing climate change, adding that BRICS “can positively contribute to…the global environmental agenda.”
Their finance ministers also agreed in May on a climate-finance framework, outlining priorities including “the reform of multilateral development banks, the scaling up of concessional finance and the mobilising of private capital to support climate efforts in the global south”.
The framework represents “common and collective BRICS action in the area of climate finance” for the first time, notes Tatiana Rosito, international affairs secretary at Brazil’s finance ministry.
The framework was adopted at the BRICS summit in July, where a number of leaders gathered to sign a joint declaration demanding that “accessible, timely and affordable climate finance” is provided to developing countries.
This, it adds, “is a responsibility of developed countries” under the Paris Agreement.
The statement also highlighted the nations’ “resolve to remain united in the pursuit of the purpose and goals of the Paris Agreement”, featuring 21 paragraphs in a section on climate change spanning just transitions, carbon markets and critical minerals.
“It is encouraging that BRICS nations called for more climate lending, deeper green bond markets and better carbon accounting,” Mirela Sandrini, interim executive director for Brazil at the World Resources Institute, said in a statement. She added:
“South-south collaboration of this scale and ambition can inject much-needed momentum into international climate diplomacy ahead of COP30.”
However, the BRICS leaders’ declaration also “acknowledge[s] fossil fuels will still play an important role in the world’s energy mix, particularly for emerging markets and developing economies”.
The inclusion of this language “undermin[es] the positives” of the bloc’s other statements on climate action, according to a response from Jacobo Ocharan, head of political strategies at Climate Action Network International.
Manuel Pulgar-Vidal, global climate and energy lead at WWF, agrees, saying climate change is “treated as background noise” in the joint statement, with “no clear articulation of the BRICS+ role in the global climate response”.
Are Brazil and China in the BRICS ‘driving seat’?
Much of the recent BRICS focus on climate change is due to Brazil being “in the driver’s seat”, says Kate Logan, director of the China climate hub and climate diplomacy at the Asia Society Policy Institute (ASPI), speaking to Carbon Brief.
As well as hosting COP30, Brazil recently chaired the G20 and is currently presiding over the BRICS. It used both of these forums to prioritise climate action on the agenda, she adds.
There has been frequent coordination between COP30, Brazilian and Chinese officials in the run-up to the conference.
This included a meeting of BRICS environment ministers held in April 2025, a separate April meeting between COP30 president André Corrêa do Lago and Chinese minister for the environment and ecology Huang Runqiu, as well as an earlier meeting in March between Huang and UN climate chief Simon Stiell.
Most significantly, Chinese president Xi Jinping appeared at a closed-door April 2025 meeting of global leaders organised by the UN and Brazil, telling his audience that “China’s actions to address climate change will not slow down”.
Many analysts saw the statement as a clear signal of China’s support for multilateralism, in sharp contrast to the US withdrawing from climate negotiations.
Xi’s participation in the meeting also underscored growing solidarity between China and Brazil on accelerating climate action.
Brazil and China have a long history of cooperation on environmental issues, including through the China-Brazil High-Level Coordination and Cooperation Commission (COSBAN).
The Brazilian government describes COSBAN as the “highest-level governmental mechanism” between the two countries. It includes tracks specifically focused on energy, agriculture and mining, as well as the environment and climate change.
But there has been a notable uptick in engagement under the new Lula administration.
For the current Brazilian administration, China is an “essential partner in global climate solutions”, according to a briefing note published by the Brazilian climate network Observatório do Clima.
A related opinion article in Brazilian newspaper Folha de S. Paolo, written by Stela Herschmann, climate policy specialist at the Observatório do Clima, and Beibei Yin, founder of environmental consultancy Bambu Consulting, argues that China and Brazil could form the “new G2” – the moniker given to the US-China alignment that they say shaped global climate policy for “more than two decades”.
They add that Brazil, through its unique role in the world and current position, can help “fill the current vacuum” of climate leadership. They write:
“Brazil enjoys the respect of the international community because it often mediates the divisions between developed and developing countries in climate negotiations…The presidency of COP30 and BRICS adds to this, making the country a natural candidate to fill the current vacuum of climate leadership.”
However, the two countries’ climate approaches have diverged at times.
Jennifer Allan, senior lecturer in international relations at Cardiff University, tells Carbon Brief: “These countries have several similar views, but also have diverged in the past.”
For example, she says, Brazil’s suggestion at COP26 of a “concentric” approach to cutting emissions, with emerging economies offering more stringent targets than other developing countries, was opposed by China, which wanted to “maintain the firewall” between developed and developing countries.
What is the role of fossil fuels in the BRICS?
Many BRICS nations remain heavily reliant on fossil fuels, both for electricity generation and to support their wider energy systems.
However, this picture is starting to shift, with almost all BRICS members having adopted net-zero targets ranging from 2050 for Brazil, South Africa and others, through to 2060 for China and Russia, or 2070 for India.
More tangibly, the addition of new clean-power projects means that fossil-fueled electricity generating capacity now makes up less than half of the installed total in the BRICS group as a whole in 2024, as shown in the figure below.
Non-fossil power, driven by “unprecedented” renewable energy growth in China, India and Brazil, accounted for 53% of the installed electricity generating capacity in BRICS countries overall in 2024, according to recent analysis by the thinktank Global Energy Monitor (GEM). This puts them in line with the global average.
Ethiopia, Brazil and China boast higher-than-average shares of clean capacity – at 100%, 88% and 57% respectively. India’s clean-capacity share stands at 43%.
Continued BRICS focus on clean energy makes it “unlikely that fossil capacity will overtake non-fossil again”, James Norman, research analyst at GEM, tells Carbon Brief, adding that much of this is driven by significant renewable additions in some members, particularly China.
While some BRICS members are continuing to commission “significant amounts of new coal-fired capacity”, he says, it remains uncertain whether these new plants will be completed, or if they will go on to operate at full capacity.
Several BRICS members are also leading producers and exporters of fossil fuels. Russia is a major exporter of all types of fossil fuels, the Statistical Review of World Energy shows, while the UAE, Iran and Indonesia have large oil- or coal-exporting industries.
The data shows that China and India, meanwhile, are by some distance the world’s largest and second-largest coal users, respectively, predominantly fueled by domestic mining. China alone accounts for more than half of global coal production and use.
Norman acknowledges that “fossil dominance remains largely unchanged” among some BRICS members.
He states that countries such as Iran, with “entrenched modes of power production”, or with “limited strategic interest in overhauling the energy sector, such as Russia”, are on a different trajectory to countries such as Brazil or China.
Nevertheless, he says, the “strong economic case for solar and wind”, as well as the fact that nearly all BRICS countries have announced renewable energy targets, “makes continued growth in clean energy across the group highly likely”.
In the short term, meanwhile, the continued reliance of some members on fossil fuels might not lessen the BRICS group’s climate ambition overall. It is “notable” that Russia does not seem to be “blocking” the “solid outcomes” of recent BRICS climate negotiations, Logan tells Carbon Brief.
Indeed, the 2024 Kazan declaration, which featured a lengthy and detailed section on climate change, was released under the Russian BRICS presidency.
Still, the group is not a united front in all areas, for example the rivalry between China and India. Tensions remain high between the two countries on a number of issues, from border disputes to supply chains and geopolitical alliances.
This has spilled into climate-related topics, with India complaining about China’s construction of mega-dams in the Himalayas and launching anti-dumping investigations into solar imports from China.
At COP29, China and India at times took up conflicting stances during negotiations – most notably during the final stages of the climate finance deal, where China “helped prevent” efforts by India to block the deal, Logan wrote in an analysis for Dialogue Earth.
Another area of contention for India at COP29 was CBAM, which it said contributed to a “very, very competitive, hostile environment” that made it “difficult” to enable an energy transition.
By contrast, Logan tells Carbon Brief, China is “much less worried” about CBAM.
(Brazil, too, is unlikely to push hard to include CBAM and other “unilateral” trade measures in the COP30 agenda, Allan says, in order to maintain its “neutral” position as the holder of the COP presidency and the trust of other parties. Indeed, it is reportedly pushing for this issue to be taken up in a new forum, completely outside the climate talks.)
Nevertheless, India and China are united in climate negotiations by their commitment to ensuring all agreements uphold the principle of common but differentiated responsibilities and respective capabilities (CBDR-RC).
“This is something [in which] they’ll continue to be aligned”, Logan says, “but how it plays out in practice is where you start to see divergences”.
A recent rapprochement in China-India relations saw Indian prime minister Narendra Modi visit China for the first time in seven years.
The two countries also came together at the International Maritime Organization, where they successfully pushed for publicly-available data on shipping emissions to be anonymised.
Earlier, Brazil, China, South Africa and several other developing countries also lobbied against the creation of a global levy on shipping emissions.
Allen notes that whether or not BRICS and BASIC can align on climate may, ultimately, be a moot point, given that BASIC is just one of several coalitions that China operates in and that it is currently “less active” than other coalitions.
For example, she says, unlike the Like-Minded Developing Countries (LMDC) group, BASIC “doesn’t negotiate as a group in contact groups” at the UN climate talks. She adds:
“Multiple coalitions are a way for [a country] to multipl[y] their influence, while also perhaps hiding its individual views among those of the group.”
What is the economic impact of clean-tech?
Beyond the realms of climate diplomacy, it is increasingly clear that there is a hard-nosed economic reality to the positions being taken by China and other BRICS nations.
Indeed, as China works with Brazil and the BRICS to centre emerging markets’ concerns in climate policy, it also plays a key role in the economics of the energy transition.
The country accounts for more than 80% of global solar manufacturing, more than 70% of electric vehicle production and more than 75% of battery production.
While most of this is consumed domestically, exports of each of these categories – which it often calls the “new-three” – are “booming”, finance news outlet Caixin reports.
Historically these exports would have been destined for developed countries. But, in 2024, “half of all China’s exports of solar and wind power equipment and electric vehicles (EVs) [went] to the global south”, Lauri Myllyvirta and Hubert Thieriot, lead analyst and data lead at the Centre for Research on Energy and Clean Air (CREA), write at Dialogue Earth.
Separate analysis by Myllyvirta for Carbon Brief revealed that China’s exports of clean-energy technologies in 2024 alone will reduce emissions in the rest of the world by 1%, avoiding some 4bn tonnes of carbon dioxide (CO2 over their lifetimes).
Moreover, clean-energy industries accounted for more than 10% of China’s GDP in 2024 for the first time ever, driving a quarter of economic growth that year.
Meanwhile, Chinese lending overseas is also increasingly focused on low-carbon infrastructure, according to the Boston University Global Development Policy Center.
Their analysis finds that the “share of renewable energy in China’s portfolio has increased significantly”, with solar and wind projects “dominat[ing]” the types of projects funded in 2022 and 2023.
This stands in sharp contrast to typical Chinese lending activity before 2021, which showed a preference for conventional power projects, such as coal and hydropower.
According to Myllyvirta and Thieriot, the “important role that clean-energy technology plays in the country’s economy and exports” will encourage China to ensure that the global energy transition “keeps accelerating”.
They add: “That will be seen in bilateral lending and diplomacy, and could also lead the country to take more forward-leaning positions in multilateral climate negotiations.”
Will China and the BRICS emerge as climate leaders?
With the withdrawal of the US from the Paris Agreement under the Trump administration, there have been increasing calls for China to take up the mantle of climate leadership.
Many are watching for signs of whether China’s upcoming international climate pledge, which may be published by the UN general assembly meeting next week, will contain ambitious targets that will encourage greater global ambition.
Beatriz Mattos, research coordinator at Brazil-based climate-research institute Plataforma CIPÓ, tells Carbon Brief that China’s position as a “major investor in the renewable energy sector” means there is “enormous potential” for both it and the BRICS to assume a climate leadership role.
China, at least publicly, is eschewing these calls. In an interview with state-owned magazine China Newsweek, climate envoy Liu Zhenmin said in response to a question about China’s climate leadership that the calls are just “the west giving us a ‘tall hat’” – an expression meaning trying to flatter China. He added:
“Of course, within their respective camps, major countries should play a more leading role, such as the EU and US in the developed countries camp, and the BASIC countries in the developing countries camp. But BASIC cannot be a substitute for all developing countries, and developing countries will still participate in [climate] negotiations within the framework of ‘G77+China’. This is the basis for cooperation in the global south.”
Notably, this does not seem to preclude China from agreeing to “demonstrate leadership” in tandem with others, as seen in an EU-China joint statement on climate change published in late July.
BASIC is “important for China in climate negotiations given the influence of other large emerging economies”, Yixian Sun, associate professor in international development at the University of Bath, tells Carbon Brief.
“On many issues (especially sensitive issues regarding its developing country status), China doesn’t want to stand out by itself,” he says, with the grouping providing cover in negotiations.
Mattos agrees, stating that “remaining part of this group serves as a way [for China] to reinforce its identity as a developing country in climate negotiations”.
More broadly, it will likely continue to align with the other BRICS nations, when this offers a way to advance its positions in climate negotiations.
Sun expects Brazil and China to sustain their elevated levels of climate cooperation even after Brazil hands over the COP presidency, based on their 2023 joint statement. However, he says there are still questions around what new bilateral climate initiatives would look like and how “concrete” they would be in practice.
Looking ahead, Logan notes, BRICS could also be in a position to sustain its influence if India hosts COP33 in 2028.
“BRICS has in multiple documents endorsed India’s bid for COP33”, she says, which, given India’s presidency of BRICS in 2026, could allow Brazil and China to “influence India in a more constructive direction” on climate, over a number of years.
The post Q&A: Will China and the BRICS fill the ‘leadership gap’ on climate change? appeared first on Carbon Brief.
Q&A: Will China and the BRICS fill the ‘leadership gap’ on climate change?
The head of the United Nations has launched an initiative aimed at holding artificial intelligence companies accountable for their exploding environmental impacts, including their carbon emissions, the amount of water and land used for data centres, and the energy they consume.
During a speech at London Climate Action Week on Tuesday, António Guterres noted that AI can accelerate climate solutions, among other key challenges, and said its potential must be harnessed.
“But AI is also hungry for land, water and power,” he emphasised, adding that the data centres needed to run AI models already consume more electricity than most countries.
The UN Secretary-General repeated a call he first made in July 2025 for all big AI companies to commit to power every data centre with renewable energy by 2030.
Some tech firms have announced they are sourcing or building out clean energy to run their hubs, but growing power demand is also contributing to gas-fired generation in the US, according to data from Global Energy Monitor.
The International Energy Agency (IEA) estimates that data centres are set to more than double the emissions from the electricity they use between 2024 and 2030 in a high-growth scenario. But AI’s use could lead to far larger reductions in the energy sector through efficiency gains if adopted widely.
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‘No more hidden costs’
Proposing the new “AI Environmental Transparency Initiative” on Tuesday, Guterres also urged big AI firms companies to measure and publicly disclose the full environmental impact of their systems, including their carbon, water, and land footprints.
“No more hidden costs. No more shifting the burden onto those least able to bear it. It is time to come clean,” he said in a major speech on responding to the world’s twin climate and energy crises. “If AI is to help build a better future, it must be honest about what it costs us now.”
A report issued earlier this month by the UN University Institute for Water, Environment and Health noted that most current assessments of AI’s environmental cost focus on carbon emissions from training models. But, it added, this misses a substantial part of the picture.
Every kilowatt-hour of electricity for AI also carries a water footprint, from cooling and generation, and a land footprint, from infrastructure and supply chains, it said.
Explainer: Will AI data centres make or break the energy transition?
The report estimated that AI data centres globally could consume 945 terawatt-hours of electricity annually by 2030 – more power than all but five countries and roughly twice France’s 2025 consumption.
Offsetting this carbon footprint by 2030 would require growing some 6.7 billion trees over 10 years, it calculated. Producing power for the data centres would consume water equal to the basic needs of 1.3 billion people in sub-Saharan Africa for a year and take up land of more than 14,500 square kilometers, roughly twice the Jakarta metropolitan area.
The European Union said earlier this month it will develop minimum energy-efficiency standards for both new and existing data centres, with a “needs assessment” due by 2027, Reuters reported. It’s also planning a sustainability label for data centres, covering criteria including water use and clean energy supply – but that has been delayed.
US community push-back
Asked after his speech what the response had been, the UN chief said “we’ll see”, without giving more details.
But, he argued that, in his view, the push for transparency “is perfectly reasonable and even positive for the AI industry, because eventually some people will say that they consume much more than they really do”. “I think the truth is essential,” he added.
Concerns about the environmental impacts of AI and the infrastructure needed to run the technology have led to growing opposition in some communities, especially in the US.
This month, Monterey Park in Los Angeles County was the first city in the United States to enact a citywide prohibition on data centres through a voter-approved ballot measure. The developers behind a proposed centre in the area had already pulled the project in April amid an increasingly hostile local environment and regulatory uncertainty.
The vote that stopped a data center: US communities query resource-hungry AI
According to nonprofit Data Center Watch, around $64 billion-worth of data centre projects nationwide were delayed or blocked between May 2024 and March 2025 as communities pushed back against them.
Industry lobby groups argue that data centres can provide economic benefits in their host communities. According to the US-based Data Center Coalition, which represents big operators and developers, data centres generate tax revenue, support construction and technical jobs, and provide infrastructure needed for cloud computing, scientific research and AI development.
The industry has also challenged claims that data centers necessarily raise electricity costs for households.
Force for good?
The UN chief said benefits can be few in the places that are home to the data centre, while “communities are often left in the dark about the environmental impact of the infrastructure rising around them”.
Guterres said companies have an “obligation” to be clear and open about the services they are offering but also the level of resources they require.
“Transparency is essential for the decisions that communities must make – and transparency is essential even for the future of artificial intelligence, and to make sure that artificial intelligence is essentially a force for good,” he told an audience of climate professionals in London
A senior UN official told journalists ahead of Tuesday’s announcement that the AI industry has started to talk about and disclose some of their impacts, but those efforts are not yet comprehensive enough.
The hope is that the new initiative will “encourage the industry to come together and take further action on it”, the official said.
The post UN asks AI companies to reveal full environmental impacts appeared first on Climate Home News.
Phillipe Ciais has spent almost four decades researching the planet’s carbon cycle – and the ways in which humans have been impacting its balance.
Based at the Laboratoire des Sciences du Climat et de l’Environnement (LSCE) on the outskirts of Paris, Ciais (pronounced “see-es”) has been listed as an author on more than 1,300 peer-reviewed studies.
In fact, analysis of Carbon Brief’s Cosmos database reveals that – by some distance – he is the most highly cited climate scientist in the world.
In a wide-ranging interview, he discusses:
The post Prof Philippe Ciais: The world’s most highly cited climate scientist appeared first on Carbon Brief.
https://www.carbonbrief.org/prof-philippe-ciais-the-worlds-most-highly-cited-climate-scientist/
Climate Change
Cited 23 June 2026: Project Cosmos launch | Science ‘under attack’ at Bonn | Emissions inequality
Welcome to Cited, your essential guide to new climate research.
In the news
SCIENCE ‘UNDER ATTACK’: Climate Home News reported that “dozens” of countries called out “coordinated attacks” aimed at “undermining the role of climate science” at UN climate talks in Bonn, Germany, last week. According to the outlet, the countries said that UN decision-making had to remain based on the “best available science”, including the reports of the Intergovernmental Panel on Climate Change. One negotiator said that India and Saudi Arabia “opposed calls in draft texts to encourage scientific work on scenarios that would minimise the magnitude and duration of any overshoot of 1.5C”, the article noted. For more, read Carbon Brief’s summary of the negotiations.
REPORT OPPOSITION: “Oil industry allies” in the US are targeting a report on extreme weather attribution, due to be published by the National Academies of Sciences, Engineering and Medicine, according to Politico. The outlet reported that the “heightened scrutiny – which involves a secretive opposition research group scouring scientists’ emails – has prompted two people to leave the 15-person panel tasked with producing the report”. Separately, the Guardian reported that the Trump administration has “reversed its decision” to dismantle the Ocean Observatories Initiative, a $368m deep-sea observation system.
SUPER EL NIÑO: BBC News reported that the US National Oceanic and Atmospheric Administration announced that El Niño had “officially begun”. Forecasts suggest the event could be among the “strongest ever recorded”, it added. Meanwhile, a “vigorous debate” is taking place about whether climate change is making the El Niño phenomenon more intense, according to the New York Times. The outlet explained that some scientists see the run of “comparatively strong” El Niño events in recent decades as an indication that “climate change is supercharging El Niño”. However, it added that “others say there is no clear evidence to support that theory”.
Research picks
Water
- Global sea level rise has nearly tripled the number of days since the 1970s when coastal water levels have surpassed average tide gauge readings | Science Advances
- As the Arctic warms, increased iceberg activity could “reshape” deep-sea habitats and “elevate” navigational hazards as maritime traffic expands | Nature
- Sea level rise has quadrupled the frequency of extreme coastal sea-level events since the year 1900 | Nature Climate Change
Inequality
- The top 10% of consumers are responsible for $1.7-5.7tn of environmental damage each year, surpassing international climate and biodiversity financing gaps | Communications Sustainability
- Calculating an individual’s emissions based on their asset ownership suggests that wealthier people are responsible for an even higher share of global greenhouse gas emissions than indicated by past studies | Nature Climate Change
- A plan that places equity at the “centre” of climate adaptation efforts in cities is needed to address the “stark disparities” between “affluent” and “disadvantaged” urban communities’ ability to prepare for extreme heat | PLOS Climate
Extremes
- In the western US, 42% of burned area over 2001-24 occurred during, and immediately following, heatwaves | Science Advances
- “Hot-to-wet” whiplash events have become more frequent across Australia over the past century, with south-eastern Australia emerging as a hotspot | Journal of Climate
- Rapid urbanisation, combined with more intense rainfall from tropical cyclones, have increased people’s exposure to “extreme” rainfall from tropical cyclones across China | Journal of Hydrometeorology
Captured
One billion additional people face at least one day of “extreme heat stress” every year compared to the 1970s, according to research published in Nature Climate Change.
The chart shows changes in “strong” (top), “very strong” (middle) and “extreme” (bottom) heat stress, defined as a “universal thermal climate index” above 32C, 38C and 46C, respectively. The grey bar shows the percentage of the global population exposed to at least one, 30 or 90 days of heat stress in 1970. The light and dark blue bars show the number of additional people experiencing heat stress over 2015-24 due to population growth and rising global temperatures, respectively.
10%
Equivalent damage to the UK’s GDP caused by climate change if global warming reaches 4C by 2100, according to new research in Nature Climate Change. The study estimates a range of 2-20%.
Spotlight
Introducing: Project Cosmos
Carbon Brief explains how it built a major new database of climate science research and unveils a new ranking of the 500 most highly cited publications, authors and institutions in climate science.
This week, Carbon Brief launched Project Cosmos – the world’s largest and most complete database of climate change research.
The database features more than 1.8m academic papers, books and reports, capturing the vast body of human knowledge about climate change that has accumulated over more than a century of academic study.
The climate science “universe” is based on reports from the Intergovernmental Panel on Climate Change (IPCC), which are recognised as the world’s most authoritative summaries of the latest climate science.
Since its first report was published in 1990, humanity’s knowledge about human-caused climate change has ballooned. The IPCC has published six sets of reports in total – each one longer than the last.
In total, IPCC reports reference more than 100,000 other papers, books and reports. This is the core of our climate science universe. Carbon Brief then built on this core, by looking at four other sources of data. Read more about how the Cosmos database was created here.
Every single publication in the Cosmos database is linked to at least one other through references. Visualising these links reveals a “galaxy” of references. In the image above, each colour and cluster reveals different topics and densities of research. Explore the galaxy in an interactive map here.
Cosmos 500
As part of an initial wave of preliminary analysis to demonstrate the scope of the Project Cosmos database, Carbon Brief has ranked the 500 most highly cited publications, authors and institutions in the database.
The most highly cited climate scientist is Prof Philippe Ciais, who has spent almost four decades researching the planet’s carbon cycle – and the ways in which humans have been impacting its balance. Carbon Brief recently interviewed Ciais in Paris.
The US tops the tables for the most highly-cited authors and institutions. Almost half of the 500 most highly-cited authors are from US institutions. This raises particular concerns for the future of climate science, as American climate scientists and institutions are coming under attack under the Trump administration.
Experts from global south countries account for only 4% of all authors in the Cosmos 500. China stands out as the most highly-cited global south country. Meanwhile, only 10% of authors in the Cosmos 500 are women.
There are many possibilities for future avenues of research using the Cosmos database. Over time, the database could be used to reveal, for example, how interest in different areas of climate science has changed over time, plus identify potential knowledge gaps and, thus, opportunities for future research.
Carbon Brief invites researchers – including academics, journalists and analysts – to submit their own proposals for co-authored studies, literature reviews and analytical projects.
Preprints to watch
Carbon Brief’s pick of new papers still going through peer review
- Regional reductions in aerosol emissions can “temporarily amplify” the likelihood of record-breaking heat events | Environmental Research: Climate
- Analysis of Reddit posts suggests the Fridays for Future movement has created “wider awareness” of global warming by drawing attention to climate change and “climate actions” | npj climate action
- Periods of simultaneous low wind and solar power generation, known as “renewable energy droughts”, will “intensify progressively” as the planet warms | Nature portfolio
Noticeboard
- 28-30 June: Seventh global conference on climate and sustainable development goal synergies, Bangkok, Thailand
- 29 June-1 July: Exeter climate conference, Exeter, UK
- 29 June-1 July: National Academy of Sciences hybrid workshop on seabed critical mineral resources, Irvine, US
- 30 June: Submission deadline for abstracts for MedCLIVAR conference, scheduled for 21-25 September in Limassol, Cyprus
- 30 June: Application deadline for postdoctoral position in ice-ocean interactions at the Physics Laboratory of Ecole Normale Supérieure de Lyon | Salary: €3,071-4,714 per month. Location: Lyon, France
- 30 June: Submissions open for abstracts for the pan-African conference on environment, climate change and health, scheduled for 21-24 October in Nairobi, Kenya
- 8 July: Application deadline for position as research officer in climate science and law at the Grantham Research Institute | Salary: £43,277-51,714. Location: London, UK
- 10 July: Application deadline for position as associate or senior editor at Nature Water | Salary: Unknown. Location: Shanghai, Beijing or Milan
Cited is researched and written by Cecilia Keating, Robert McSweeney, Ayesha Tandon, Daisy Dunne and Dr Giuliana Viglione.
Please send tips, feedback and upcoming climate research to cited@carbonbrief.org
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The post Cited 23 June 2026: Project Cosmos launch | Science ‘under attack’ at Bonn | Emissions inequality appeared first on Carbon Brief.
Cited 23 June 2026: Project Cosmos launch | Science ‘under attack’ at Bonn | Emissions inequality
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