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Warm-water coral reefs have crossed a tipping point due to global heating and are dying at an accelerated rate due to repeated mass bleaching events, impacting hundreds of millions of people who rely on them for fishing, tourism and protection from rising seas and storm surges, according to new research.

Global average temperatures are about 1.3-1.4C above pre-industrial times, which is higher than coral reefs can withstand. Their thermal tipping point is estimated to be 1.2C of warming.

If the trend is not reversed, coral reefs around the world will be lost, warned the second Global Tipping Points report, released on Monday and produced by more than 160 scientists in 23 countries, led by the Global Systems Institute at the UK’s University of Exeter.

Of the seven tipping points monitored by the researchers, this is the first to be shown as already passed. “We’ve actually already lost about half our warm-water coral reef cover, and we can expect accelerated change in the next few decades as well,” said Mike Barrett, chief scientific advisor at WWF-UK.

The report also said parts of the West Antarctic and Greenland ice sheets are losing ice at an accelerating speed, coming close to collapse. Greenland’s ice sheet is losing 266 billion tonnes of ice mass per year. If that meltwater flows into the North Atlantic and destabilises its subpolar gyre (large rotating current), it could produce a “Little Ice Age” in Europe, with worsening heatwaves in the summer but freezing months in the winter.

The report also said the Amazon rainforest is at greater risk than previously thought. Steven Smith from the Global Systems Institute told a webinar on the report that “the combined effects of climate change and deforestation put this [the rainforest] under threat between 1.5 to 2 degrees of warming.”

    Overshooting the 1.5C warming limit governments promised to try to keep to under the Paris Agreement now looks “pretty inevitable”, and could happen around 2030, according to the report.

    The researchers said they are working with Brazil to ensure that tipping points are discussed at the COP30 climate summit it will host in November, highlighting actions that need to be taken fast.

    Those include phasing out fossil fuels, increasing support for clean technologies and infrastructure, and switching to more sustainable food systems.

    “Governance systems, national policies, rules, multinational agreements – including the Paris Agreement – were not designed with tipping points in mind,” said Manjana Milkoreit from the University of Oslo. “They’re made for linear or gradual changes, not the abrupt, irreversible and interconnected shifts in the Earth systems that we’re now facing.”

    The consequences of a warming ocean

    Corals not only provide livelihoods, food security and protection from tropical storms for over half a billion people – they also deliver $2.7 trillion annually in global economic benefits, the scientists said.

    Melanie McField, founder and director of the Healthy Reefs for Healthy People Initiative (HRI), explained that the tipping point is not necessarily irreversible, as not all corals are affected at the same time – and ocean protection efforts in general could save them from becoming victims of overfishing and pollution.

    In recent weeks, new reports have confirmed the effects of heat on the oceans and marine life. The EU Copernicus Ocean State Report showed that almost a quarter of the global ocean surface experienced at least one severe to extreme marine heatwave event in 2023 – a trend that has accelerated since 2005.

      And last month, the annual planetary boundaries report from the Potsdam Institute for Climate Impact Research (PIK) said the planetary limit for ocean acidification had been surpassed for the first time, weakening the oceans’ ability to act as Earth’s stabiliser.

      Oceans turn more acidic by absorbing CO2 from the atmosphere, a process that threatens marine life, with 1,677 species at risk of extinction, PIK said. The Copernicus report indicates a 16.5% increase in ocean acidity since 1985.

      Meanwhile, ocean heatwaves not only have become more frequent but have also caused the planet’s seas to reach new record temperatures. The warmest the ocean has been since satellite data started to be collected was in spring 2024, when the global average hit 21C. More than 90% of the excess heat trapped in the Earth’s system due to human-caused global warming has been absorbed by the oceans, according to the US National Oceanic and Atmospheric Administration. 

      Marta Marcos, an associate professor at the University of the Balearic Islands and one of the Copernicus’ study authors, told Climate Home News another key issue is the acceleration in sea level rise, which began speeding up in the 1960s-70s and is now above 4 millimetres per year. “Sea level not only continues to rise, but is rising at an ever faster rate,” she said.

      Rate of global sea level rise: 1999-2006 (31.4 mm/decade), 2007-2015 (39.3 mm/decade), and 2016-2024 (40.8 mm/decade). Source: EU Copernicus Ocean State Report (OSR)

      While sea level rise is a global trend, the major risk is in densely populated cities near the sea. For example, in Europe around 200 million people live near coastlines and higher baseline sea levels increase the threat to their homes and infrastructure from extreme weather. “When a storm comes, with its surge and waves, it has a much greater destructive potential,” explained Marcos.

      Blue NDCs bring oceans into climate plans

      Marcos believes there is growing government interest in protecting the oceans. In September, the High Seas Treaty, which lays the ground for the creation of marine protected areas (MPAs) in international waters, reached the 60 government ratifications needed for it to take effect.

      And during New York Climate Week in September, Chile and the UK committed to include ocean-based solutions in their national climate plans (known as NDCs). Eleven countries have now joined the “Blue NDC” project which encourages governments – depending on their circumstances – to manage marine ecosystems, phase out offshore oil and gas production, expand clean ocean energy, cut emissions and support sustainable fisheries.

      Others with Blue NDCs are Brazil, France, Australia, Fiji, Kenya, Mexico, Palau, Madagascar and the Republic of Seychelles.

      Such ocean-based solutions can provide 35% of the emissions reductions the world needs by 2035, a study by the High Level Panel for a Sustainable Ocean Economy shows. 

      Mary Creagh, the UK’s minister for nature, said oceans are central to her country’s NDC – but work is still being finalised on how to count emissions reductions from seagrass and seaweed management and coastal restoration. “We’re working on the science, which we’re happy to share globally once it is complete,” she added. 

      A horned sea star surrounded by trash off the coast of Efate Island, Vanuatu. Three quarters of countries that emit over 10,000 tonnes of plastic are situated close to endangered and critically endangered corals and fragile and critical marine ecosystems. (Photo: Reuters)

      A horned sea star surrounded by trash off the coast of Efate Island, Vanuatu. Three quarters of countries that emit over 10,000 tonnes of plastic are situated close to endangered and critically endangered corals and fragile and critical marine ecosystems. (Photo: Reuters)

      One key challenge is getting the world’s largest fish-producing countries to sign up to tackle ocean issues in their climate plans, particularly Asian heavyweights such as China, Indonesia, India and Vietnam.

      Blue NDC member and COP30 host Brazil, meanwhile, recently announced its largest oil and gas discovery in 25 years in the Santos Basin, 400 kilometres off its coast.

      Nonetheless, Marcos said such initiatives are important, adding that any effective action “has to be global, coordinated, and based on data and science”.

      Marinez Scherer, a marine biologist and coastal management expert who is the COP30 Special Envoy for Oceans, said the upcoming operationalisation of the High Seas Treaty is a step forward on the path to the climate summit, which she said would discuss a plan to speed up implementation of ocean solutions.

      Scherer said COP30 will present measures that are currently working in Brazil and show the world what’s needed to “plan and manage the ocean in a very healthy and sustainable way”.

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      Climate Change

      UN chief urges countries to adopt fossil fuel transition plans with timelines

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      The head of the United Nations has called on all countries to deliver plans for phasing out their production and consumption of fossil fuels, as rising oil prices and climate shocks threaten energy and human security.

      In his farewell speech to the UN General Assembly (UNGA) in New York on Tuesday, outgoing UN Secretary-General António Guterres for the first time urged “every government to adopt a national plan to transition away from fossil fuels” aligned with limiting warming to 1.5C. The plans, he said, should include “clear timelines and protection for affected workers and communities”.

      “We know fossil fuel interests won’t step aside on their own. For decades, Big Oil has treated the atmosphere as an open sewer – and cashed in on the consequences,” Guterres told diplomats in his speech opening the leaders’ segment of the assembly, also calling out the industry’s windfall profits after Russia’s invasion of Ukraine.

        At last year’s COP30 climate summit in Belém, a group of about 80 governments led a failed push to develop a global roadmap to transition away from fossil fuels. Brazil instead proposed to draft a voluntary report that will be presented this year ahead of COP31 after countries and organisations submitted their views to the process.

        Governments first agreed to transition away from fossil fuels in energy systems at COP28 in Dubai in 2023, but have since failed to agree at UN climate talks on how to move forward with that commitment, as efforts to do so have been effectively blocked by large fossil fuel-producing countries.

        France, Netherlands issue plans

        A few countries have moved forward with their own transition plans. France launched the first one at an international conference on the issue in April and the Netherlands followed suit this month. Not being major fossil fuel producers, both European nations aim to end their coal, oil and gas consumption by 2050, although the Dutch plan was criticised for not setting specific phase-out dates for the dirty fuels.

        Adão Soares Barbosa, climate ambassador from Timor-Leste and chair of the Least Developed Countries (LDC) group in the UN climate negotiations, told a press briefing on Tuesday that last year’s discussions on shifting away from fossil fuels need to continue at COP31, adding that developed countries should lead the way with transition plans and curb their use of fossil fuels.

        “We are expecting that we can make a request to major-emitting countries to limit emissions from this sector,” he said. “For LDCs, we’ll also try to reduce fossil fuel use, but it will depend on national circumstances.”

        Samoa’s lead negotiator Anna Rasmussen said small island states have outlined their energy transition plans in their nationally determined contributions (NDCs) – countries’ plans for meeting the Paris Agreement goals – but added “we’re still waiting” for climate finance to help implement those plans.

        Despite the global push to clean up the energy mix, countries leading climate talks are themselves also expanding fossil fuel production. COP31 co-presidents Australia and Türkiye have both recently given the green light to mine and drill more coal, oil and gas, and still depend on fossil fuels for 60% and 56% of their electricity production respectively.

        Fossil fuel expansion threatens COP31 hosts’ credibility, experts warn

        COP30 host nation Brazil has also persisted with its plans to explore potential new oil reserves near the mouth of the Amazon River – a region known as the Equatorial Margin.

        These are moving ahead despite President Luiz Inácio Lula da Silva announcing last year at the Belém climate summit that the country would develop its own fossil fuel phase-out plan. This is still under development with little information about its progress and may be hampered by elections next month.

        “We have achieved our self sufficiency in oil and will continue to explore the potential of new reserves, such as those in the Equatorial Margin,” Lula said in his speech to the UNGA on Tuesday. “But we will not abandon the environmental agenda,” he insisted. “We will move forward with the roadmap for the decarbonisation of the Brazilian economy.”

        Transition far cheaper than status quo

        Speaking at the main Climate Week NYC venue, Mads Christensen, executive director of Greenpeace International, said given the fast-shifting cost dynamics for both fossil fuels and renewables, countries should revise their existing energy plans because they are now out of date.

        Gas power generation now costs around 150 euros per megawatt compared with around 50 euros for solar with battery storage – making the latter two-thirds cheaper.

        “If these plans were updated, I think we would have a much faster transition because it simply makes good financial sense,” he said.

        A technician walks next to solar panels that partially provide electrical power to the Grand Mosque of Istiqlal in Jakarta, Indonesia (Photo: REUTERS/Willy Kurniawan)

        A technician walks next to solar panels that partially provide electrical power to the Grand Mosque of Istiqlal in Jakarta, Indonesia (Photo: REUTERS/Willy Kurniawan)

        Tzeporah Berman, founder and chair of the Fossil Fuel Treaty Initiative, told Climate Home News that the Santa Marta process for transitioning away from fossil fuels (TAFF), launched at April’s conference, could help countries discuss, design and develop their national roadmaps, as well as mobilise the international cooperation required to actually deliver them.

        “Many countries want not only national roadmaps but a global roadmap off the highway to hell,” she added. “A global plan is necessary to ensure the rules aren’t rigged against those who want to do the right thing and so all countries can make credible commitments.”

        The second TAFF conference will be held in the Pacific island nation of Tuvalu next spring, co-chaired by Ireland. In New York, Tuvalu’s climate minister Maina Vakafua Talia called for stepped-up efforts to tackle the fossil fuel use that is threatening his country’s “demise” by driving global warming.

        “The world is running out of time, and so I ask every government to come to… Tuvalu with solutions – real solutions, not false solutions – for us to ensure that we have a pathway and a way forward,” he urged.

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        COP31 electrification pledge leaves out clean power commitment

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        COP31’s flagship initiative to accelerate the electrification of the world’s economy has been criticised for failing to include a commitment to produce the power from clean energy.

        Governments that sign the voluntary pledge at this year’s UN climate summit will commit to increasing electricity’s share of total energy consumption to 35% globally by 2035 in line “with pathways consistent with keeping 1.5C alive”, the text unveiled by the Turkish presidency on Tuesday says.

        While the document says that the electrification goal is “complementary to efforts to expand renewable energy and improve energy efficiency”, governments are not explicitly asked to commit to producing the extra power with clean sources and driving down greenhouse gas emissions.

        The text instead says the “use of clean electricity” will vary according to national circumstances. Fossil fuels are not mentioned by name, although the pledge cites the COP28 Global Stocktake decision, which called for “transitioning away from fossil fuels” in energy systems.

          COP31 president Murat Kurum said earlier this month that the push to make electrification more “widespread” – through measures like the rollout of electric vehicles and heat pumps – will “automatically” lead to a reduction in the use of fossil fuels.

          But many campaigners disagree, criticising the proposed pledge for failing to give an explicit signal on the fossil fuel transition.

          Lack of clarity on energy sources

          “Let’s not let electrification become the Trojan horse of our times, used to hide new fossil fuel consumption rather than promote renewable energy,” Claire Smith from civil society umbrella group Beyond Fossil Fuels said in reaction to the pledge’s publication.

          She added that the commitment will only help address the climate crisis if electrification is powered by a flexible energy system where solar and wind are complemented by enhanced grids and storage.

          The pledge’s text says that the electricity goal should be supported by “diverse and sustainable energy sources”, but it stops short of explaining what these sources are.

          Alden Meyer, an international climate policy expert and senior associate at think-tank E3G, said the details of the pledge matter to how effective it will be in helping bring planet-heating emissions down.

          “It has to be clean, and we haven’t got enough clarity on a guarantee that it will be a decarbonisation move,” he told Climate Home News.

          China’s industrial engine starts to break its fossil fuel habit

          According to an annual electricity review from energy think-tank Ember, in 2025 renewables edged ahead of coal power for the first time in 100 years. Continued growth in solar and wind pushed the share of renewables above a third of global electricity generation to just under 34%, compared with coal at 33%, it said.

          Janet Milongo, energy Transition lead at CAN International, said success cannot be measured simply by how much of the world’s final energy consumption becomes electric.

          “We must ask what generates that electricity, who has access to it, who owns the infrastructure, and whether it is helping communities transition away from fossil fuels,” she added.

          Electrification alone can’t meet climate goals

          Analysis published by the IEA on Tuesday, alongside the pledge, found that it would already be cost-effective to raise electricity’s share of global energy use from 23% today to around 33% with existing technologies, putting the COP31 goal “within striking distance”. Based on current policies, however, the share reaches only about 30% by 2035.

          Hitting the 35% target would cut fossil fuel importers’ import bills by around $400 billion a year by 2035, the IEA said. At the higher prices caused by the conflict in the Middle East, that saving rises to more than $500 billion.

          Speaking at New York Climate Week on Tuesday, IEA executive director Fatih Birol said the agency’s figures show that in 2026, about 80% of all new power plants built will run on renewables, with a few percentage points coming from nuclear power and the rest from fossils fuels. “So therefore, electrification itself will lead reduction of the [greenhouse gas] emissions,” he added.

          IEA Executive Director Fatih Birol speaks at Climate Week NYC on September 22, 2026 (Photo: Megan Rowling / Climate Home News)

          IEA Executive Director Fatih Birol speaks at Climate Week NYC on September 22, 2026 (Photo: Megan Rowling / Climate Home News)

          However, the IEA warned in its new report that electrification “by itself is not enough” to meet the world’s climate targets. It noted that, if “low-emission” sources of power continue to simply grow in line with current policy scenarios, that would be only just enough to cover the extra demand from electrification, driving a modest decline in emissions.

          Matt Webb, associate director of global clean power diplomacy at E3G, said the pledge is a “welcome signal of leadership” and can help COP31 be a “critical moment” for countries to double down on the energy commitments made at COP28.

          But to secure the full benefits of electrification, he added, it is essential that we “urgently clean up” by speeding up the rollout of renewables and developing credible national plans to transition away from fossil fuels.

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          Climate Change

          As loss and damage fund stalls, Nepal crowdfunds flood relief

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          People around the world have donated almost $90 million to a government-led campaign to help Nepal recover from its recent devastating Himalayan flood, according to a Nepali climate negotiator, even as the UN chief slammed the tiny amount of money in a new fund to deal with such disasters.

          Individuals and companies from Nepal and abroad have chipped in from $5 to “many millions” of dollars to the Prime Minister’s Disaster Relief Fund, Manjeet Dhakal, an advisor to the poorest countries at UN climate talks, told an event on Monday focused on early warning systems.

          The prompt and substantial response from the public contrasts with the slower, more limited support that is potentially on offer from the UN’s new Fund for Responding to Loss and Damage (FRLD), set up by governments to compensate developing countries for climate disasters.

          Comment: Human security relies on adapting to the world’s new climate reality

          Over three weeks have passed since Nepal’s finance and environment ministers asked the FRLD board to take an urgent decision to allocate funding to help Nepal protect people and restore essential services in the wake of the disaster, which caused around 1,450 deaths and left more than 5,000 people missing.

          “Time is of the essence,” the ministers wrote in an appeal to the FRLD on August 31, which was swiftly followed by a letter from a group of developing-country board members urging the FRLD board’s co-chairs to organise an extraordinary meeting to come up with a response.

          Loss and damage fund hesitates

          Yet, despite informal online meetings, the co-chairs have yet to convene a meeting with the power to allocate funds. The board’s next scheduled meeting begins on December 15.

          Dhakal said on Monday that the request has “received some positive response, but still there is some discussion ongoing about how to respond to that”.

          “If they can’t respond in a timely manner, then is [the fund] fit for purpose in terms of disasters that the world would be facing in the coming years? The scale and intensity of these disasters is increasing,” he said.

          With just $820 million pledged to it by rich countries and not all of that yet delivered, the FRLD has earmarked just $350 million to spend in its initial phase and without further contributions could run out of money next year.

          Because of these limited funds, and a huge number of requests for funding totalling nearly $3 billion, the FRLD has said it will only give out a maximum of $20 million to each project for now. It has yet to approve funding for any projects.

          Dhakal recently told The Nation magazine that this amount was just a “symbolic gesture”. Nepal’s government has estimated the costs of recovery and reconstruction at $4.8 billion, with homes, roads, bridges, hospitals and hydropower stations in the affected area needing to be repaired and rebuilt.

          “Ridiculously small” funding

          In a speech to the UN General Assembly on Tuesday, the body’s outgoing Secretary-General António Guterres criticised the “ridiculously small” level of funds made available by wealthy governments to the FRLD. Developed countries should “make the loss and damage fund work at scale”, he said.

          Secretary-General António Guterres speaks at UNGA (Photo: UN Photo/ Loey Felipe)

          The Portuguese diplomat told world leaders that when he travelled to Nepal three years ago, he had “sounded the alarm on accelerating glacier melt, warning that the rooftops of the world are caving in”.

          “Some dismissed it all as overstating dangers, but as tragic events have shown, impacts are arriving sooner, hitting harder, and spreading further than many anticipated,” he said.

          A recent study by scientists with the World Weather Attribution group found that climate change contributed to the rock-ice avalanche which sparked a huge flash flood along a river valley on the Nepal-Tibet border.

          Speaking at a separate event in New York on Monday, leading climate scientist Johan Rockström highlighted those findings on the role of global warming in the Himalayan disaster.

          “This will be potentially the first poster-child case of a loss and damage invoice, because here we have a proven case of a catastrophe which would not have occurred if it hadn’t been for human-caused climate change,” he said.

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