Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
China’s new climate pledge
GUTERRES DEMANDS: UN secretary general António Guterres hosted a special climate action summit in New York on Wednesday, the Associated Press reported, alongside the closing day of the UN general assembly. It added that at the “marathon session”, where 121 world leaders were scheduled to speak, Guterres said: “The science demands action. The law commands it. The economics compel it. And people are calling for it.”
CHINA CUTS: First billing went to President Xi Jinping, who unexpectedly appeared via video to announce a target of cutting emissions – from all greenhouse gases and across China’s entire economy – to 7-10% below peak levels by 2035, according to Bloomberg. This is a significant moment for global climate efforts, noted BBC News, as it is the first time that China has pledged to reduce its emissions in absolute terms.
CAUTIOUS RESPONSE: However, the pledge fell short of the “at least 30%” cut observers had said was needed, BBC News added. Carbon Brief has published a detailed Q&A on China’s new climate pledge and will host a free webinar on the topic. Sign up for free.
PLEDGE CONFUSION: The Guardian said “120 countries and the EU announced new goals” at the summit. However, Carbon Brief analysis of the speeches and official submissions found that only 11 countries offered new targets. Following the summit, countries representing half of global emissions have now announced or submitted their 2035 climate pledges, according to analysis just published by Carbon Brief.
Trump’s new climate sledge
‘CLIMATE CON’: The day before the Guterres summit, Donald Trump had used a nearly hour-long speech to the UN general assembly to deliver what the Bloomberg Green newsletter called a “blizzard” of “climate misinformation”. He attracted blanket coverage – and multiple factchecks – for false claims including that climate change was the “greatest con job ever” and that warming predictions were “wrong”.
FACTCHECK: Contrary to Trump’s claims, human-induced warming is an “established fact”, according to the IPCC, as is an increase in the strength and frequency of extreme weather events. Regarding climate models, Carbon Brief climate science contributor Dr Zeke Hausfather noted on Bluesky that projections of warming have been “pretty spot on”.
Around the world
- RENEWABLE RECORD: Global investment in renewable energy grew 10% year-on-year to a record $386bn in the first half of 2025, the Guardian said.
- CARBON CLUB: COP30 host Brazil is “trying to build a coalition of countries, including the EU and China, to unify carbon markets”, Bloomberg reported.
- FOSSILS OUT?: Colombia will host the first-ever international conference on phasing out fossil fuels in 2026, according to Climate Home News. Meanwhile, E&E News covered the latest UN “production gap” report saying, despite a COP28 pledge to transition away from fossil fuels, “many are planning for even more production”.
- SUPER TYPHOON: Ragasa, a category 5 “super typhoon” and the world’s most powerful tropical cyclone this year, killed 17 people in Taiwan, BBC News said. The storm, which was “intensified” by climate change according to the Hong Kong Free Press, caused nearly two million residents to be evacuated in China, added Xinhua,
- DEFORESTATION DELAY: The EU has delayed the start of its anti-deforestation law “by another year”, Reuters said, blaming “IT system concerns”.
- AIRPORT APPROVAL: The UK government approved a second runway at London’s Gatwick airport, said BBC News. The Sunday Times reported that it was also “poised to soften” its ban on new drilling in the North Sea.
62,700
The number of deaths in Europe linked to heat-related causes in 2024, the continent’s hottest year on record, according to new research covered by Reuters.
Latest climate research
- Extreme and “unprecedented” global water-scarcity events – or “day-zero droughts” – could happen in the 2020s and 2030s | Nature Communications
- The drying of the Ganga river, of great economic and cultural importance to millions of people in India, Nepal and Bangladesh, is “unprecedented in the last 1,300 years” | Proceedings of the National Academy of Sciences
- The likelihood of “severe bushfires danger” in Australia driven by a positive Indian Ocean Dipole has increased by 16-32% due to climate change | Journal of Geophysical Research: Atmospheres
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
China’s new climate pledge, outlined by President Xi Jinping, includes a target to reduce “economy-wide net greenhouse gas emissions” to 7-10% below peak levels by 2035. But, as Carbon Brief explained in a detailed Q&A, this falls short of what would have been needed to contribute to limiting warming to 1.5C, according to experts.
Spotlight
Can COP30 respond to the 1.5C challenge?
With hopes fading of keeping global warming below 1.5C, despite new pledges at a UN summit in New York, this spotlight looks at the road to COP30 in Brazil and how the climate talks might respond.
After 2024 marked the hottest year on record and the first above 1.5C, 2025 was supposed to offer a chance to “course correct” through new, more ambitious national climate plans.
Instead, many countries have missed repeated deadlines for updated “nationally determined contributions” (NDCs) under the Paris Agreement, setting out their plans to 2035.
Despite some new pledges in New York this week – including from China – collective efforts still “fall short” of limiting warming to the Paris goals of “well-below” 2C while “pursuing efforts” towards 1.5C.
Drumbeat of ‘disappointment’
This message is likely to be reinforced by a UN “synthesis report”, compiling the impact of new NDCs and due to be published on 24 October.
It will likely be reiterated in early November by the UN’s annual “emissions gap” report. Last year’s report had called for a “quantum leap” in ambition, which has yet to materialise.
This is all despite an advisory opinion from the International Court of Justice in July, which said that 1.5C should be considered the “primary temperature goal” of global climate efforts – and that countries should make “adequate contributions” towards meeting it.
Meanwhile, amid oil and gas advocacy from the Trump administration, debate is raging over whether fossil fuels have peaked – and whether climate efforts need a “pragmatic” reset.
This is set to culminate with a battle to control the narrative around the International Energy Agency (IEA) World Energy Outlook for 2025, also due in early November.
Avantika Goswami, programme manager for climate change at India’s Centre for Science and Environment, told Carbon Brief that the global climate regime was at a “turning point”, where agreements had been signed and targets set, but action was “stalling”. She said:
“Implementation is weak, finance is undelivered and trust in the UN system is eroding, amid trade wars, militarism, debt crises and fractured multilateralism.”
Can COP30 respond?
Just days after the raft of new reports, on 6-7 November, heads of state and government will gather in the Brazilian city of Belém for a leaders summit ahead of the COP30 climate talks.
Views differ on how COP30 should respond to the current challenges.
The Brazilian presidency is pushing for a formal COP decision on any “disappoint[ment]” over NDCs falling short, collectively, of what is needed to avoid dangerous global warming.
During initial consultations, the EU said it wanted climate ambition to be added to the COP agenda, while the groups of least developed countries (LDCs), small island states and Latin American countries supported a formal COP decision on the matter. Others pushed back.
Catherine Abreu, director of the International Climate Politics Hub, told Carbon Brief that COP30 would need to respond in some way. She said:
“It’s clear that credibility at COP30 will require a response to the fact that countries’ climate pledges don’t add up to the level of ambition needed to tackle the crisis. The question after this week is, how will the COP outcomes enrich our definition of ambition beyond a headline emissions reduction goal?”
Abreu added that COP30 would need to address barriers, including “the equitable finance needed to implement goals and a lagging transition away from fossil fuels”.
Amid frustration over slow progress, calls for reform of the COP process are getting louder.
Goswami concluded: “The needs and ambitions of the global south must now shape the climate narrative – and COP30 must reckon with this new balance of power.”
Watch, read, listen
GAME OVER?: A feature in the Wall Street Journal said that, as Trump “doubles down on fossil fuels”, the US is “forfeiting the clean-energy race to China”.
POPULIST PUSHBACK: The Drilled podcast talked to a sociologist and a political scientist about “the intersection between the rise of rightwing populism and increasing resistance to acting on climate”.
ADULTS ONLY: For the New York Times, the Asia Society Policy Institute’s Li Shuo wrote that China was “the adult in the room on climate now”, despite its “modest” new pledge.
Coming up
- 22-26 September: Fifth world congress of biosphere reserves, Hangzhou, China
- 27 September: Seychelles elections
- 28 September: Moldova elections
- 30 September-1 October: 42nd UN water meeting, Geneva, Switzerland
Pick of the jobs
- Indigenous Climate Action, research coordinator | Salary: $55,000-$68,000. Location: Remote
- Greater London Authority, head of climate change | Salary: £91,268. Location: London
- Stockholm Environment Institute, research fellow: climate impact and climate finance | Salary: Unknown. Location: Nairobi, Kenya
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 26 September 2025: China leads new climate pledges; Trump calls warming a ‘con job’; What comes next appeared first on Carbon Brief.
Climate Change
Leading scientists call for EPBC reforms to strengthen Great Barrier Reef protection
CANBERRA, Monday 27 October 2025 — More than 100 Australian scientists and researchers have called on the Labor Government to address deforestation in the new nature law reforms, warning that the impacts under the current Act “compound the damage caused by repeated mass bleaching events driven by climate change” to the Great Barrier Reef.
Environment Minister Murray Watt will soon table the draft bill to reform Australia’s broken nature law, the Environment Protection and Biodiversity Conservation (EPBC) Act. Leading environmental groups Greenpeace Australia Pacific, the Australian Marine Conservation Society, and the Australian Conservation Foundation coordinated the open letter with 112 leading Australian scientists, calling for the reforms to close loopholes in the Act that allow for rampant and unchecked deforestation, especially in the Great Barrier Reef catchment.
Read the letter here.
Elle Lawless, senior campaigner at Greenpeace Australia Pacific, said:
“Now is the time to act decisively for nature, and design a nature-first nature law that will do what it is set out to do: protect our environment. Toxic runoff from deforestation in the Great Barrier Reef catchment is poisoning the reef and suffocating the precious and fragile marine ecosystem. The Great Barrier Reef is a global icon, and we need a strong, robust EPBC Act that will safeguard and protect it. This is one of the most important pieces of legislation our country and our environment has and, done right, has the power to make serious and desperately needed positive changes to protect nature.”
Professor James Watson FQA, from UQ’s School of the Environment, said:
“Australia’s State of the Environment report, released by the federal government in 2021, shows that our oceans, rivers and wetlands are in serious decline. That report, and the Samuel review of the EPBC, make the point that there is a desperate need for stronger national nature laws that help protect these precious places for generations to come.
“Australia’s top environmental academics and experts have been sounding the alarm for decades: the large-scale destruction of Australia’s native woodlands, forests, wetlands and grasslands is the single biggest threat to our biodiversity. It’s driving an extinction crisis unlike anywhere else on Earth — and it’s threatening the Great Barrier Reef, one of the world’s seven natural wonders, right before our eyes.”
Continued mass deforestation threatens the Great Barrier Reef’s World Heritage status. In 2026, the World Heritage Committee will review Australia’s progress in protecting the reef and may consider placing it on the World Heritage in Danger list if major threats like deforestation are not addressed.
Recent figures from the Queensland Government show deforestation in Queensland is the worst in the nation and worsening under the current national environment law. Deforestation in the Great Barrier Reef catchment accounted for almost half (44%) of the state’s total clearing, an increase on the previous year.
Greenpeace Australia Pacific is calling for the EPBC reforms to meet four key tests:
- Stronger upfront nature protection to guide better decisions on big projects, including National Environmental Standards.
- An independent Environmental Protection Agency (EPA) to enforce the laws and make decisions about controversial projects at arm’s length from politics.
- Closing deforestation loopholes that allow for harmful industries to carry out mass bulldozing across Australia.
- Consideration of the climate impacts on nature from coal and gas mines when assessing projects for approvals.
“We will continue to engage with the government constructively in the reform process but also hold decision-makers to account over these critical tests,” Lawless said.
—ENDS—
Leading scientists call for EPBC reforms to strengthen Great Barrier Reef protection
Climate Change
Close Major Deforestation Loopholes in the EPBC Act
22 October 2025
The Hon Anthony Albanese MP
Prime Minister
Parliament House
CANBERRA ACT 2600
Sent via email
To the Prime Minister, Federal Environment Minister, and Members of the Albanese Government,
As researchers who study, document and work to recover Australia’s plants and animals, insects and ecosystems, we are keenly aware of the value of nature to Australians and the world.
Australia has one of the worst rates of deforestation globally. For every 100 hectares of native woodland cleared, about 2000 birds, 15,000 reptiles and 500 native mammals will die. As scientists and experts, we have sounded the alarm for more than 30 years that the large-scale destruction of native woodlands, forests, wetlands and grasslands was the single biggest threat to the nation’s biodiversity. That is still the case today, and it is driving an extinction crisis.
New figures show that Queensland continues to lead the nation in deforestation. The latest statewide landcover and trees study (SLATS) report shows that annually 44% of all deforestation in Queensland occurs in the Great Barrier Reef catchment areas, where over 140,000 hectares are bulldozed each year.
Deforestation in Great Barrier Reef catchments is devastating one of Australia’s most iconic natural wonders. When forests and bushland are bulldozed, erosion causes debris to wash into waterways, sending sediment, nutrients and pesticides into the Reef waters. This smothers coral, fuels crown-of-thorns starfish outbreaks, and reduces water quality. These impacts compound the damage caused by repeated mass bleaching events driven by climate change.
The Great Barrier Reef sustains precious marine life, supports local and global biodiversity, and underpins tourism economies and coastal communities that rely on its survival. Continued mass deforestation threatens these values and could jeopardise the Reef’s World Heritage status. In 2026 the World Heritage Committee will review Australia’s progress in protecting the Reef and may consider placing it on the World Heritage in Danger list, if key threats to the Reef, including deforestation, are not addressed.
This mass deforestation happens due to a loophole in the Environment Protection and Biodiversity Conservation (EPBC) Act, our national nature law. Exemptions allow deforestation to continue largely unregulated by the EPBC Act through a grandfathering clause from 2000 known as “continuous use”. Without meaningful reform, deforestation will continue to drive massive biodiversity loss. This loophole must be closed as part of the proposed EPBC Act reforms. The law is meant to safeguard our wildlife and our most precious places like the Great Barrier Reef. Please support closing major deforestation loopholes in the EPBC Act as an urgent and priority issue for the Federal Government.
Sincerely,
Professor James Watson, University of Queensland
Dr. Michelle Ward
Mandy Cheung
Mr Lachlan Cross
Timothy Ravasi
Gillian Rowan
Dr Graham R. Fulton, The University of Queensland
Dr Alison Peel
Dr James Richardson University of Queensland
Luke Emerson, University of Newcastle
Dr Hilary Pearl
Dr Tina Parkhurst
Dr Kerry Bridle
Dr Tracy Schultz, Senior Research Fellow, University of Queensland
Dr. Zachary Amir
Prof David M Watson, Gulbali Institute, CSU
Naomi Ploos van Amstel, PhD candidate
David Schoeman
Associate Professor Simone Blomberg, University of Queensland
Professor Euan Ritchie, Deakin University
Dr Ian Baird, Conservation Biologist
Paul Elton (ANU)
Melissa Billington
Hayden de Villiers
Professor Brett Murphy, Charles Darwin University
Professor Sarah Bekessy
Professor Anthony J. Richardson (University of Queensland)
Prof. Winnifred Louis, University of Queensland
Dr Yung En Chee, The University of Melbourne
Dr Jed Calvert, postdoctoral research fellow in wetland ecology, University of Queensland
A/Prof Daniel C Dunn, Centre for Biodiversity and Conservation Science, University of Queensland
Lincoln Kern, Ecologist
Professor Corey Bradshaw, Flinders University
Dr. Viviana Gonzalez, The University of Queensland
Prof. Helen Bostock
Dr Leslie Roberson
Bethany Kiss
Assoc. Prof Diana Fisher, UQ, and co-chair of the IUCN Marsupial and Monotreme Specialist Group
Dr Jacinta Humphrey, RMIT University
Professor Mathew Crowther
Christopher R. Dickman, Professor Emeritus, The University of Sydney
Fiona Hoegh-Guldberg, RMIT University
Dr Bertram Jenkins
Dr Daniela ParraFaundes
Dr Jessica Walsh
Dr. GABRIELLA scata – marine biologist, wildlife protector
Katherine Robertson
Professor Jane Williamson, Macquarie University
William F. Laurance, Distinguished Professor, James Cook University
A/Prof Deb Bower
Dr Leslie Roberson, University of Queensland
Ms Jasmine Hall, Senior Research Assistant in Coastal Wetland Biogeochemistry, Ecology and Management, Australian Rivers Institute, Griffith University
Dr Kita Ashman, Adjunct Research Associate, Charles Sturt University
Genevieve Newey
Matt Hayward
Jessie Moyses
Natalya Maitz, PhD Candidate, The University of Queensland
Christina Ritchie
Liana van Woesik, PhD Student, University of Queensland
Benjamin Lucas, PhD Researcher
A/Prof. Carissa Klein, The University of Queensland
Conrad Pratt, PhD Student, University of Queensland
Dr Ascelin Gordon, RMIT University
Professor Nicole Graham, The University of Sydney
Professor Murray Lee, University of Sydney Law School
Dr Tracy Schultz, Snr Research Fellow, University of Queensland
Libby Newton (PhD candidate, Sydney Law School)
Hannah Thomas, University of Queensland
Professor Richard Kingsford, Director of the Centre for Ecosystem Science, UNSW Sydney
Dr Anna Hopkins
Lena van Swinderen, PhD candidate at the University of Queensland
Professor Jodie Rummer, James Cook University
Dr Nita Lauren, Lecturer, RMIT University
Dr Christina Zdenek
Madeline Davey
Dr Rachel Killean, Sydney Law School
Dr. Sofía López-Cubillos
Dr Claire Larroux
Dr Alice Twomey, The University of Queensland
Zoe Gralton
Dr Robyn Gulliver
Ryan Borrett, Murdoch University
Adjunct Prof. Paul Lawrence, Griffith University, Brisbane Qld
Professor Susan Park, University of Sydney
Dr Holly Kirk, Curtin University
Deakin Distinguished Professor Marcel Klaassen
Dr Megan Evans, UNSW Canberra
Dr Amanda Irwin, The University of Sydney
Dr Keith Cardwell
Professor Don Driscoll, Deakin University
Susan Bengtson Nash
Distinguished Professor David Lindenmayer
Dr Madelyn Mangan, University of Queensland
Dr Isabella Smith
Geoff Lockwood
Dr Paula Peeters, Paperbark Writer
Prof Cynthia Riginos, University of Queensland
Dr. Sankar Subramanian
Associate Professor Zoe Richards
Dr Jessie Wells, The University of Melbourne
Professor Gretta Pecl AM, University of Tasmania
Dr April Reside, The University of Queensland
Oriana Licul-Milevoj (Ecologist)
Dr Yves-Marie Bozec, University of Queensland
Dr Julia Hazel
Dr Judit K. Szabo
Ana Ulloa
Dr Andreas Dietzel
Philip Spark – North West Ecological Services
Jonathan Freeman
Dr/ Mohamed Mohamed Rashad
Climate Change
The Ocean We’re Still Discovering
The recent discovery of Grimpoteuthis feitiana, a new species of Dumbo octopus found deep in the Pacific, is a reminder of something both humbling and urgent: we still know so little about the ocean that shapes our lives. This fragile, finned creature, gliding silently more than a kilometer beneath the waves, has lived in these waters long before we mapped them, and its story is only now coming to light.

What moves me most about this discovery is not just the Dumbo octopus itself, but how it bridges science and culture. Its name draws inspiration from the flying apsaras of China’s Dunhuang murals, those graceful, winged figures that seem to dance through air and imagination. It reminds me that the deep sea has always held a place in our collective human story, — not only in myths and art, but in the ways we relate to nature, learn from it, and find meaning within it.
Pasifika connection to the ocean
For us in the Pacific, the ocean is more than a body of water. It is our identity, our culture, our history. Our ancestors read the seas to navigate, to survive, to connect communities scattered across islands. Discoveries like this Dumbo octopus awaken something deeper in me, — a sense that the ocean is alive with stories and wisdom we are only beginning to rediscover. And with that understanding comes a responsibility to protect it.

Each new species like the Dumbo octopus, each glimpse into the deep, is a warning as much as it is a wonder. The creatures of the abyss live slow, deliberate lives in fragile ecosystems, shaped by balance and patience. Deep-sea mining, pollution, and climate change threaten to erase them before we even learn their names. Protecting the Pacific’s oceans is not an abstract act of conservation; it is an act of cultural preservation, of love for our home, and for the unseen life that sustains us all.
Grimpoteuthis feitiana is more than a scientific discovery. It is a reminder that the ocean is still full of life, mystery, and wisdom — and that we have a duty to ensure these depths remain wild, healthy, and alive, for us and for the generations yet to come.
Reflection by Raeed Ali
Pacific Community Mobiliser
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