Thomas Hahn is associate professor at the Stockholm Resilience Centre and Stockholm University research leader for FAIRTRANS. Robert Höglund is a carbon removal advisor with Marginal Carbon. Mikael Karlsson is associate professor at Uppsala University and research leader for FAIRTRANS.
Recent news articles, in the Guardian and from Bloomberg among others, have proclaimed the death of the 1.5°C target given how emissions and lack of sharper commitments are developing. In a new study, in Nature Communications we examine how the responsibility to limit long-term warming to 1.5°C could be allocated after a temporary overshoot, if countries are held accountable in line with the principle of Common But Differentiated Responsibility and Respective Capabilities (CBDR-RC) as established under the UNFCCC.
This principle, a cornerstone of climate diplomacy, recognizes that while all countries share responsibility for addressing climate change, their obligations differ based on historical emissions and capacity to act. By comparing countries’ past emissions and future emission claims with their equal cumulative per capita emissions, we establish a new indicator – “additional carbon accountability” – showing countries’ responsibilities beyond current climate targets.
If existing national climate targets are met, the 1.5°C fossil carbon budget (for a 50% probability of meeting that goal) will be exceeded with 576 billion tonnes of carbon dioxide (GtCO₂). To meet the 1.5°C target, our indicator shows that the EU, China, the US, and 15 other countries must sharpen their own current targets with faster mitigation and more carbon dioxide removal (CDR), such as afforestation and technical solutions like direct air capture and biochar. All other countries must stick to their national climate plans (nationally determined contributions – NDCs) and net-zero targets.
Counting future emissions
As an example, the EU would need to mitigate or remove an additional 48 GtCO₂ or finance additional reductions beyond current targets in other countries, on top of reaching its own targets in terms of the NDC for 2030 and net zero emissions by 2050. For China, the additional carbon accountability is 150 GtCO₂ and for the USA 167 GtCO₂.
While there is no international agreement on how to operationalize the fairness principles of the Paris Agreement, the new indicator – based on the CBDR-RC – provides an important tool to clarify what different countries are accountable for in relation to the mitigation (emissions) gap. This information feeds directly into the contested annual negotiations on climate financing within the UNFCCC COP meetings.
In general, high-income countries have large carbon debts, while several of the BRICS and upper-middle-income countries have high planned future emissions. Much focus of climate advocacy has been on getting high-income countries to reduce their emissions. Of planned future emissions, 26% come from high-income countries, but as much as 38% comes from upper-middle-income countries with an additional carbon accountability.
China and Iran, for example, have plans for large future emissions and could theoretically meet a large part of their accountability by achieving stricter reduction targets. But countries that have most of their emissions in the past, like the US and the EU, need to turn to not only stricter targets but also CDR, ensuring net negative outcomes.
National responsibility
Unlike the COP29 outcome on financing, which hinges on the division between developed and developing countries, our indicator assigns responsibility to individual countries based on their additional carbon accountability. This approach bypasses the debate over whether only developed countries should collectively finance emissions reductions in developing countries, instead focusing solely on national accountability for emissions.
In the article, we also calculate what it would cost to meet the accountability with CDR or reductions if the cost is $150 per tonne of carbon dioxide. For Iran, the total additional carbon accountability cost would be 1,200% of its GDP in 2021, Russia 530%, China 130%, the US 110%, and the EU 41%.
Our article points to how the responsibility to stay under 1.5°C in the long term could be allocated in line with the CBDR-RC principle. But will countries shoulder this responsibility?
Political will in short supply
For most high-income countries, the focus in practice is more on meeting existing targets, with the topic of paying for historic carbon debt absent. There is also no agreement among countries on how to operationalize the CBDR-RC principle. And few would expect countries like Russia and Iran to make radical emissions reduction cuts, not to mention taking any responsibility for historic emissions.
Hence, it does not seem very likely from the current political situation that countries would increase the ambitions of their national climate plans and net zero targets enough to meet their additional carbon accountability. However, what seems unlikely today can change.
Moreover, every fraction of a degree matters, and our indicator can be used also for other temperature targets, such as 1.7°C or 2.0°C. Our results can be used to put higher pressure on individual countries with plans for large future emissions and to start holding countries with large carbon debts accountable for their historic emissions.
Dr. Ingo Fetzer, a researcher on global systems analyses with the Stockholm Resilience Centre at Stockholm University and Dr. Johannes Morfeldt, a researcher in climate and energy systems at Chalmers University of Technology also contributed to this article.
The post How to resuscitate 1.5°C by identifying accountable countries appeared first on Climate Home News.
How to resuscitate 1.5°C by identifying accountable countries
Climate Change
‘Step up and lead’: All eyes on Australia as it takes the reins of UN COP31 climate negotiations
ANTALYA, Türkiye, Saturday 7 November 2026 — As leaders and delegates gather for the UN COP31 climate summit, Greenpeace Australia Pacific is calling on the Australian government in its role as President of Negotiations to ensure the just transition away from fossil fuels is central to negotiations, rigorously defend the 1.5°C temperature goal, and significantly scale up climate finance commitments.
This year’s climate talks take place amidst a deepening global energy shock, and grim reports that the world will barrel past the 1.5°C temperature goal. They also follow a deadly summer of extreme weather disasters that swept the northern hemisphere, with fears that a severe El Niño will see similar dangerous impacts in Australia.
But recent election wins by progressive candidates in the United States and Brazil are set to breathe energy and optimism into the negotiations as people around the world, bearing the brunt of soaring cost of living and climate disasters, shun regressive and divisive politics.
Speaking from Antalya, Dr Simon Bradshaw, COP31 Lead at Greenpeace Australia Pacific, said: “The world is in a moment of flux. We know it is in moments of huge upheaval that era-defining progress can happen — but only when countries step up and lead.
“As Australia takes control of COP31 Negotiations, we have an opportunity and responsibility to shepherd global climate cooperation through this moment of interlocking crises. That means backing Pacific leadership and priorities, and leading by example at home to end fossil fuels and deliver new, multi-year climate finance commitments.
“As a major coal and gas exporter, Australia plays an outsized role in fuelling the climate crisis, and has approved 38 new, extended and expanded fossil fuel projects since first elected in 2022. More than half the world’s coal export project pipeline is in Australia, and the Albanese Government is poised to make decisions on massive new gas projects. Australia must reckon with this reality.
“Domestically, we have made significant strides on ramping up renewables and the global ‘35 by 35’ electrification goal is welcome and necessary. But electrification must end fossil fuel dependence, not be an end in itself — its ultimate success depends on ensuring electricity comes from renewable sources that displace fossil fuels and align with a 1.5°C pathway.
“In Türkiye, the Australian government can rise to the occasion and show what true climate leadership looks like, but we can not move the world towards a clean energy future while expanding the industry we need to leave behind.”
Speaking from Antalya, Shiva Gounden, Head of Pacific at Greenpeace Australia Pacific, said: “As leaders meet in Türkiye amidst warnings that we will pass the 1.5°C threshold, the stakes have never been higher. Every heatwave, every flood, every storm is being unleashed on communities with the deadly force of accumulated emissions and gives a warning of what is to come.
“In Antalya, the COP31 Presidency must respond to the accelerating climate crisis and defend the 1.5°C goal based on the law and the science. 1.5°C is a non-negotiable survival line for Pacific communities and climate-vulnerable nations facing rising seas, extreme weather disasters, food insecurity and soaring economic costs. It is a fundamental component of the Paris Agreement and enshrined as a binding legal benchmark by the world’s highest court, the International Court of Justice.
“Australia must arrive at COP31 with more than meaningless speeches. The Pacific and the world need concrete dates, credible plans to deliver roadmaps away from fossil fuels built on the best available science, and a commitment to put people, energy security and the planet ahead of fossil fuel interests.
“We need real action to advance multilateral climate cooperation, ensure the just transition away from fossil fuels is high on the agenda, and back longstanding Pacific priorities — including keeping 1.5°C alive and significantly scaling-up climate finance.”
ENDS
Images and footage from Greenpeace’s COP31 ‘Keep 1.5°C alive’ photo opp in Antalya can be found here
Greenpeace has a diverse range of experts available for interviews and commentary from Antalya. Headshots can be found in Greenpeace Media Library here
Media contact: Kate O’Callaghan in Antalya (GMT+3) on +61 406 231 892 (Whatsapp/Signal)
‘Step up and lead’: All eyes on Australia as it takes the reins of UN COP31 climate negotiations
As an extreme El Niño breaks marine temperature records, COP31 is set to boost the profile of the ocean’s role in solving climate change, but finance and clear conservation measures will be needed for it to move the needle, experts said.
The Turkish presidency has announced plans for an Antalya Ocean Declaration that recognises the centrality of the global ocean – the world’s largest carbon sink – in regulating the climate and minimising the now unavoidable overshoot of global temperatures above 1.5C over pre-industrial levels.
Meanwhile, as part of the formal UN negotiations, Australia has announced plans to land a cover decision in Antalya, which, according to veteran former US negotiator Sue Biniaz, would be the only section of the formal negotiations where the role of oceans could be included.
She added that an outcome at COP31 seems likely, given the initiative from both presidencies and a push from over 100 countries – including Brazil, the EU and the African Group of countries – calling for the UN negotiations to deliver a plan for implementing ocean measures.
Governments will arrive in Antalya with a “super El Niño” adding stress to marine ecosystems and expected to continue to intensify until December 2026, with parts of the Pacific averaging almost 30C (86F) – over 3C more than normal – in October, according to monthly EU sea temperature data.
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COP31 Briefing: What to expect from the Antalya climate summit?
Electrification, the fossil fuel transition, adaptation to rising impacts, climate science and trade are key themes as governments gather for COP31 in Türkiye -
European nations signal support for fossil fuel roadmap, says COP30 president
André Corrêa do Lago told Climate Home News that it’s up to other nations to decide how the fossil fuel and deforestation roadmaps are used -
Nepal seeks stronger recognition of mountain issues in UN climate process
Flood-hit Nepal wants COP31 to adopt a new agenda item formalising work on mountains and climate change and boosting the response to rising risks
Needs for ocean conservation and funding
While elevating the ocean agenda is “critical”, it must lead to funding for ocean conservation and a clear plan for reaching the global target – set at UN biodiversity talks in 2022 – of protecting 30% of the global ocean by 2030, said Pradeep Singh, senior ocean governance expert at Oceano Azul Foundation.
The ocean is precisely where governments are farthest off track from meeting this target – informally known as the 30×30 goal. Even if countries meet all their nature conservation plans, only about 12% of the global ocean would be protected, the UN says.
“Acknowledgment of marine protected areas and the 30×30 target as climate infrastructures will certainly boost efforts and funding for science and management,” Singh told Climate Home News.
Shamini Selvaratnam, director of international climate and clean energy at Ocean Conservancy, said an ocean commitment that makes a difference in coastal communities “takes funding, local capacity and support that countries can actually access”.
An analysis by climate think tank Zero Carbon Analytics shows that investment in the blue economy – through activities like sustainable fisheries or cleaner shipping – is only at about 2% of the needs, which are estimated at $550 billion per year.
Following-through on commitments
Selvaratnam added that countries must also establish mechanisms to follow through on these measures, which currently only exists in the form of a non-binding dialogue that is not expected to produce any negotiated agreements.
She said that countries at COP31 must find ways for their ocean commitments to inform the next global stocktake, the UN’s five-yearly review of progress on climate action. Some countries – including African countries, Latin American nations, small island states and the European Union – have backed a process that culminates in the next global stocktake.
At climate negotiations, countries are not mandated to include ocean conservation measures in their climate plans. But a group of countries led by France and Brazil is pushing them to do so voluntarily through an initiative called Blue NDC Challenge. Seventeen countries have joined the initiative so far.
In its list of COP31 priorities, the EU has called for the “critical role” of oceans to be recognised, but falls short of calling for any specific actions to feature marine action more prominently in climate plans.
As part of their demands, ocean campaign groups have called for the establishment of an “Antalya Ocean Compact”, a platform where countries can coordinate efforts across different environmental treaties, including the UN climate, biodiversity and high seas negotiations.
Ultimately, Selvaratnam said a strong deal “must accelerate emissions cuts, clean energy, and a transition away from fossil fuels, including offshore oil and gas”.
Ilana Seid, chair of the AOSIS group of small island states and permanent representative of Palau to the UN, said during a press briefing last week that “meaningful progress” on emissions reduction is “the best way” to alleviate stress on the ocean.
The post ‘Blue COP31’ set to spotlight need for ocean protections amid record heat appeared first on Climate Home News.
‘Blue COP31’ set to spotlight need for ocean protections amid record heat
In the wake of its recent glacial flooding disaster, Nepal and the kingdom of Bhutan have proposed a new agenda item on mountains and climate change for the COP31 summit which opens on Monday in the Turkish city of Antalya.
In a submission addressed to the COP31 presidency and the head of the UN climate secretariat (UNFCCC), Nepal said the agenda item, entitled “1.5°C Warming in Mountains”, is an effort to strengthen the response of the international community to the climate risks facing the world’s mountain regions.
The item proposes that mountain issues should become a regular part of the formal UN climate change process, with a focus on scientific assessment of the risks associated with warming overshooting 1.5C, an annual high-level dialogue, a dedicated work programme and improved access to climate finance.
Maheshwar Dhakal, chief of the climate change management division of Nepal’s Ministry of Agriculture, Forests and Environment, told Climate Home News that Himalayan countries face similar problems such as collapsing glaciers and flooding from glacial lakes.
“We are trying to bring all Himalayan countries together under this agenda item,” he said.
COP31 Briefing: What to expect from the Antalya climate summit?
At this year’s UN General Assembly, Nepal’s Prime Minister Balendra Shah called for strong global action to ensure climate justice and proposed creating a Himalayan Climate Resilience Mechanism led by India, China and Nepal. It would share satellite data, monitor glacial slopes and lakes, strengthen early warning systems and coordinate cross-border disaster response.
Nepal has experienced significant infrastructure losses and human casualties from flooding every year since 2020. In late August, the collapse of a glacial slope on the border with Tibet caused a torrent of water and debris to course down the Bhote Koshi River, leaving more than 6,000 people dead or missing.
According to a government needs assessment, the disaster caused an estimated $2.7 billion in physical damage and economic losses, while around $4.8 billion will be required for recovery and reconstruction.
More research needed on threats
Although high mountain regions are known to be fragile ecosystems, especially as global warming accelerates glacier melt, the extent of their vulnerability is still not fully understood. When the devastating Bhote Koshi floods hit, it opened the eyes of the world to the risks.
Dhakal said the Bhote Koshi floods “have proved the impacts of climate change in the Himalayan region”, which were linked to rising temperatures by scientists with the World Weather Attribution group. “Therefore, Nepal wants scientific studies, research and political discussions on mountain climate risks to receive greater attention at international climate conferences,” he added.
Nepal has been making efforts on this front since 2009, when it held a cabinet meeting at Kalapatthar near Mount Everest. Since COP28 in Dubai, Nepal has organised high-level events and dialogues on mountain issues at COPs and is co-hosting one at COP31 with Bhutan, Pakistan, Kyrgyzstan and Tajikistan.
Editor’s Desk: Nepal’s disaster has laid bare the world’s adaptation accountability gap
Dhakal said the dialogues held so far have raised awareness, but mountain concerns must become part of the formal UN climate process to unlock climate finance and technical support that can bolster countries’ capacity to tackle climate threats.
If specific indicators and priorities are developed for mountain regions, vulnerable developing countries like Nepal would have better access to finance to help them adapt to the climate warming they have done very little to cause, he added.
More detailed data would enable them to prepare stronger project proposals for international climate funds, including the Green Climate Fund (GCF). In 2025, the GCF backed a project to protect livelihoods from climate-induced flooding in Nepal but it took seven years to get approval.
Sindhu Dhungana, an alternate board member at the GCF, said the problem is becoming more widespread and urgent for the Hindu Kush Himalaya region.
“The economies, cultures and almost everything in Himalayan countries depend on mountains,” he explained. “For us, climate change is mountain change… [it has] affected everything, including the economy and biodiversity.”
Destroyed development projects
Nepal wants the UN climate process to address mountain risks both before and after disasters. Countries need better research, technology, early warning systems and other adaptation measures to protect people and infrastructure. But even when countries take precautions, loss and damage is likely to occur and will require international support to address it.
Nepal has been provisionally allocated $21.6 million from the United Nations’ new Fund for Responding to Loss and Damage (FRLD) to help with the aftermath of the Bhote Koshi disaster, but this is just a fraction of needs and the money will come only months after it made an initial request.
Dhakal pointed to the damage caused by floods to infrastructure built with loans, such as the Melamchi Drinking Water Project, which received $312 million from the Asian Development Bank but was destroyed by a major flood in 2021, shortly after it began operating. The recent Bhote Koshi disaster wiped out a dozen hydropower facilities, as well as solar energy systems.
Nepal flood destruction shows “limits to adaptation”, scientists say
Nepal wants international discussions on what should happen when climate-related disasters destroy development projects built using credit, and how the loans should be treated afterwards.
“Climatic disasters wash out… projects, but the burden of loan is still paid by Nepal,” Dhakal said.
For now, it remains unclear whether the opening session of COP31 will consider or adopt the proposed agenda item on mountains and climate change, with consultations on how to respond still underway among governments and the COP31 co-presidencies.
“If countries agree to discuss the proposal and include it in the agenda, that would be another step forward,” Dhakal said. “Further discussions in the coming years could gradually give the mountain agenda a stronger shape.”
The post Nepal seeks stronger recognition of mountain issues in UN climate process appeared first on Climate Home News.
Nepal seeks stronger recognition of mountain issues in UN climate process
