Connect with us

Published

on

The “cost” of cutting UK emissions to net-zero is less than the cost of a single fossil-fuel price shock, according to a new report from the Climate Change Committee (CCC). 

Moreover, a net-zero economy would be almost completely protected from fossil-fuel price spikes in the future, says the government’s climate advisory body.

The report is being published amid surging oil and gas prices after the US and Israel attacked Iran, which has triggered chaos on international energy markets.

It builds on the CCC’s earlier advice on the seventh “carbon budget”, which found that it would cost the UK less than 0.2% of GDP per year to reach its net-zero target.

In the new report, the CCC sets out for the first time a full cost-benefit analysis of the UK’s net-zero target, including the cost of clean-energy investments, lower fossil-fuel bills, the health benefits of cleaner air and the avoided climate damages from cutting emissions.

It finds that the country’s legally binding target to reach “net-zero emissions” by 2050 will bring benefits worth an average of £110bn per year to the UK from 2025-2050, with a total “net present value” of £1,580bn.

The CCC states that its new report responds to requests from parliamentarians and government officials seeking to better understand its cost assumptions, amid the ongoing cost-of-living crisis in the UK.

The report also pushes back on “misinformation” about the cost of net-zero, with CCC chair Nigel Topping saying in a statement that it is “important that decision-makers and commentators are using accurate information to inform debates”.

Co-benefits outweigh costs

The CCC’s new report is the first to compare the overall cost of decarbonising with the wider benefits of avoiding dangerous climate change, as well as other “co-benefits”, such as cleaner air and healthier diets.

It sets the CCC’s previous estimate of the net cost of net-zero – some £4bn per year on average out to 2050 – against the value of avoided damages and other co-benefits.

These “co-benefits” are estimated to provide £2bn to £8bn per year in net benefit by the middle of the century, according to the report.

The CCC notes that this approach allowed it to “fully appraise the value of the net-zero transition”.

It concludes that the net benefits of reaching net-zero emissions by 2050 are an average of £110bn per year from 2025 to 2050.

These benefits to the UK amount to more than £1.5tn in total and start to outweigh costs as soon as 2029, says the CCC, as shown in the figure below.

Costs and benefits of the CCC’s “balanced pathway” to net-zero, £bn per year (undiscounted). Purple: net cost of investments in clean-energy technologies.Yellow: operating costs and savings. Red: Co-impacts such as health benefits. Peach: avoided climate damages. Black line: Overall net cost-benefit. Source: CCC.

In addition, the CCC says that every pound spent on net-zero will bring benefits worth 2.2-4.1 times as much.

This updated analysis includes the value of benefits from improved air quality being 20% higher in 2050 than previously suggested by the CCC.

However, the “most significant” benefit of the transition is the avoidance of climate damages, with an estimated value of £40-130bn in 2050. The report states:

“Climate change is here, now. Until the world reaches net-zero CO2 [carbon dioxide] emissions, with deep reductions in other greenhouse gases, global temperatures will continue to rise. That will inevitably lead to increasingly extreme weather, including in the UK.”

The CCC’s conclusion is in line with findings from the Office for Budget Responsibility (OBR) in 2025, which suggested that the economic damages of unmitigated climate change would be far more severe than the cost of reaching net-zero. 

The CCC notes that its approach to the cost-benefit analysis of the net-zero target is in line with the Treasury’s “green book”, which is used to guide the valuation of policy choices across UK government. 

It says that one of the key drivers of overall economic benefit is a more efficient energy system, with losses halved compared with today’s economy.

It says that the UK currently loses £60bn a year through energy waste. For example, it says nearly half of the energy in gas is lost during combustion to generate electricity.

In a net-zero energy system, such energy waste would be halved to £30bn per year, says the CCC, thanks to electrified solutions, such as electric vehicles (EVs) and heat pumps.

For example, it notes that EVs are around four times more efficient than a typical petrol car and so require roughly a quarter of the energy to travel a given distance.

Collectively, these efficiencies are expected to halve energy losses, saving the equivalent of around £1,000 per household, according to the CCC.

Net-zero protects against price spikes

The CCC tests its seventh carbon budget analysis against a range of “sensitivities” that reflect the uncertainties in modelling methodologies and assumptions for key technologies. This includes testing the impact of a fossil-fuel price spike between now and 2050.

In the original analysis, the committee had assumed that the cost of fossil fuels would remain largely flat after 2030.

However, the report notes that, in reality, fossil-fuel prices are “highly volatile”. It adds:

“Fossil-fuel prices are…driven by international commodity markets that can fluctuate sharply in response to geopolitical events, supply constraints, and global demand shifts. A system that relies heavily on fossil fuels is, therefore, exposed to significant price shocks and heightened risk to energy security.”

It draws on previous OBR modelling of the impact of a gas price spike. This suggested that future price spikes would cost the UK government between 2-3% of GDP in each year the spike occurs, assuming similar levels of support to households and businesses as was provided in 2022-23.

The CCC adapts this approach to test a gas-price spike during the seventh carbon budget period, which runs from 2038 to 2042.

It finds that, if a similar energy crisis occurred in 2040 and no further action had been taken to cut UK emissions, then average household energy bills would increase by 59%. In contrast, bills would only rise by 4%, if the UK was on the path to net-zero by 2050.

The committee says that when considering the impact on households, businesses and the government, a single fossil-fuel price shock of this nature would cost the country more than the total estimated cost of reaching.

The finding is particularly relevant in the context of rising oil and gas prices following conflict in the Middle East, which has prompted some politicians and commentators to call for the UK to slow down its efforts to cut emissions.

In his statement, Topping said that it was “more important than ever for the UK to move away from being reliant on volatile foreign fossil fuels, to clean, domestic, less wasteful energy”.

Angharad Hopkinson, political campaigner for Greenpeace UK, welcomed this finding, saying in a statement:

“Each time this happens it gets harder and harder to swallow the cost. The best thing the UK can do for the climate is also the best thing for the cost of living crisis – get off the uncontrollable oil and gas rollercoaster that drags us into wars we didn’t want but still have to pay for. Inaction on climate is unaffordable.”

Benefits remain even if key technologies are more expensive

In addition to testing the impact of more volatile fossil-fuel prices, the CCC also tests the implications if key low-carbon technologies are cheaper – or more expensive – than thought.

It concludes that the upfront investments in net-zero yield significant overall benefits under all of the “sensitivities” it tested. As such, it offers a rebuttal to the common narrative that net-zero will cost the UK trillions of pounds. 

The net cost of net-zero comes out at between 0% and 0.5% of GDP between 2025 and 2050, says the CCC, under the various sensitivities it tested.

“This sensitivity analysis shows that an electrified energy system is both a more efficient and a more secure energy system,” adds the CCC.

Finally, the report takes into account the costs of the alternative to net-zero. It looks at what would need to be spent in an economy where net-zero was not pursued any further.

The CCC says that the gross system cost of the balanced pathway falls below the baseline cost from 2041, which is consistent with its previous seventh carbon budget advice.

As shown in the chart below, costs fall under a net-zero pathway between 2025 to 2050, whereas they rise in the baseline of no further action.

Moreover, the total costs of the alternatives are broadly similar, with the relatively small difference shown by the solid line.

Gross investment and operation costs for both the “balanced pathway” scenario and the baseline scenario
Gross investment and operation costs for both the “balanced pathway” scenario and the baseline scenario, £bn/year, out to 2050. Source: CCC analysis.

The decline in energy system costs shown in the figure above is broadly driven by more efficient low-carbon technologies, says the CCC, helping costs to fall from 12% of GDP today to 7% by the middle of the century.

The CCC’s new analysis comes ahead of the UK parliament voting on and legislating for the seventh carbon budget, which it must do before 30 June 2026.

The post CCC: Net-zero will protect UK from fossil-fuel price shocks appeared first on Carbon Brief.

CCC: Net-zero will protect UK from fossil-fuel price shocks

Continue Reading

Climate Change

As science comes under attack at UN talks, climate movement splits over how to respond

Published

on

With June’s UN climate talks inching towards gridlock, a group of diplomats calling themselves “Friends of Science” issued a stark warning: climate science was under attack in Bonn.

The coalition, spanning the world’s richest to its most vulnerable nations, pointed the finger primarily at those who think “science threatens their economic prospects” – a thinly-veiled reference to fossil fuel-dependent states accused of casting doubt on long-held scientific tenets in the UN climate process.

Fiji’s lead negotiator, Sivendra Michael, went still further. He denounced what he called “a very polluted narrative” taking hold outside the negotiating rooms and singled out ECO, a daily newsletter on the talks produced by Climate Action Network (CAN) International, for overlooking the issue.

“They are representing developing countries, but they are not representing us,” Michael said. His words hinted at how a rift between governments over the science of global warming has created tensions inside the climate movement.

Watchers of the UN climate talks have told Climate Home News there is growing unease over where the world’s most influential coalition of climate NGOs stands in an increasingly heated debate about how scientific messages produced by the Intergovernmental Panel on Climate Change (IPCC) are crafted and turned into global climate policy.

UN sets out narrow path back to 1.5C warming after inevitable overshoot

CAN’s international leadership has publicly backed a line of argument, championed by some big emerging economies including India, that questions how fair and equitable the models underpinning the work of the IPCC – the UN’s climate science body – are because they are dominated by research from the Global North.

But some climate activists, including from nations on the frontline of the climate crisis in the Pacific, are increasingly disappointed by CAN’s silence in a connected row over whether the IPCC’s forthcoming assessment report should be finished in time to inform the next UN scorecard of global climate action.

Over the last two years, India, Saudi Arabia, China, Russia and Kenya have pushed back against attempts by a large coalition of nations to align the IPCC’s AR7 report timeline with the second stocktake of national climate plans under the UN climate process. They claim this would put a burden on developing countries with limited resources and restrict their ability to provide scientific input into the process.

India flags bias in IPCC assumptions

CAN International Executive Director Tasneem Essop spoke at an online event last month in which panelists challenged the “Friends of Science” campaign launched at the Bonn talks.

During the webinar, an Indian scientist and government negotiator set out her view that the IPCC’s way of working and scientific assumptions perpetuate inequity between developed and developing countries – and yet its reports have come to be treated as “scripture” that cannot be questioned.

In her intervention, Essop did not comment directly on the Bonn science campaign nor on the IPCC timeline issue. But the participation of CAN’s leadership in an event where such criticism of the IPCC was aired has sparked concern in some parts of the NGO community.

“The way in which CAN International is playing into what could be the destruction of the IPCC inputs into the climate process is very concerning,” said Bill Hare, who was involved in CAN’s establishment nearly four decades ago and now runs think-tank Climate Analytics.

Science ‘under attack’ from fossil fuel interests at UN climate talks

He added that it was a mistake for CAN International to align itself with arguments made by India and Saudi Arabia, when those countries are blocking the conclusion of the IPCC’s next key report on cutting emissions in time for it to feed into the next global stocktake, which is due to conclude in 2028.

Like other insiders Climate Home News spoke to, the veteran Australian climate scientist fears these tensions could hamper CAN’s widely recognised power to influence the talks.

“The CAN International voice has been very, very important in the process. That voice doesn’t need to be diluted at this moment in history – that would be a really bad move,” Hare said.

Dialogue to reconcile differing views

Over the last decade, CAN has been working to transform itself into an organisation that is more representative of, and responsive to, voices and needs in the Global South. In 2019, it appointed Essop – a South African expert on climate, energy, poverty and social justice – as executive director, shifting further away from its European and North American roots.

CAN International, which functions as the broader network’s secretariat, says it is discussing how to reconcile varying views on the IPCC and the science and equity question among its hundreds of member groups spread across 130 countries.

“We acknowledge that there are different perspectives within a global network of over 2,000 members on these issues,” CAN International’s Essop said in response to questions from Climate Home News. “Given this diversity, we have democratic processes to build internal agreements.”

“Science and equity are both fundamental principles for effective climate action and are firmly embedded in CAN’s work,” she added in a written statement. “Putting these principles into practice in a painfully unjust world is not always straightforward, which is why we need continued dialogue across the network.”

Calls for “fair share” approach

The webinar in late August – which aimed to untangle what organisers described as “a growing narrative” that “treats science and equity as opposing priorities” – opened with a presentation by Tejal Kanitkar, a prominent Indian climate scientist who also serves on her government’s delegations at the IPCC and UN climate talks.

Outlining the findings of a paper she co-authored, Kanitkar argued that the IPCC had used scenarios for future emission reduction trajectories based primarily on assumptions put forward by Global North researchers that are skewed against the world’s poorest nations. These, she noted, were then incorporated into the first UN review of global climate action in 2023 and turned into widely cited emissions-cutting targets for limiting warming to 1.5C – a goal the UN has now conceded will be breached, at least temporarily.

Tejal Kanitkar speaking at a meeting of the IPCC in March 2026. Photo: IPCC Secretariat | Melissa Walsh

Tejal Kanitkar speaking at a meeting of the IPCC in March 2026. Photo: IPCC Secretariat | Melissa Walsh

Kanitkar said the “Friends of Science” group included “some of the people who have over-consumed the carbon budget and now use science as a slogan”. When Climate Home News raised the participation of diplomats from vulnerable countries, she said they should be asked why they “accept outcomes that burden the poorest the most”.

Commenting on Kanitkar’s presentation, CAN’s Essop said everyone knows that “imbalances of power dictate who sits at the table, who designs the models and who determines the assumptions underlying them”.

Her wider intervention focused more generally on the need to ensure that emissions-reduction pathways follow an equitable approach and account for the “fair share” of action countries need to take based on their historical responsibilities for climate change.

IPCC working to update models

Hare later acknowledged that most of the IPCC models used for 1.5C scenarios fail to account for the higher cost of capital and transition financing faced by developing countries. But as this is a “well-known” limitation, the IPCC gives a nuanced reading of the scenarios, and the next generation of models it uses is expected to include more consideration of equity, he added.

Echoing this, a climate scientist from a developing country currently involved in the IPCC process, who did not want to be identified, told Climate Home News that economic models inevitably contain biases and IPCC authors are already working to identify and correct them.

    Despite criticisms of how IPCC scientific reports have been produced, all governments must sign off on every line of a key “summary for policy-makers” at a dedicated meeting. In 2023, the approved summary included the emissions reduction figures in question that informed the UN’s first global stocktake.

    Irrespective of this wider debate, Hare said the “Friends of Science” campaign, which he supports, is focused on the timing of the IPCC’s next assessment cycle rather than the equity of its models.

    Unresolved row over IPCC report timeline

    A political battle over that time-frame has dragged on for more than two years at successive meetings of the science panel, with governments repeatedly failing to find a solution.

    A large majority of nations have been pushing for a timeline that would ensure the next round of AR7 reports can feed into the UN’s global stocktake. But a group of countries, including Saudi Arabia, India, China, Russia and Kenya, have said at previous IPCC meetings that this would put a burden on developing countries with limited resources and have lobbied for a longer process.

    Member of the “Friends of Science” campaign wears a pin in Bonn. Photo: IISD/ENB – Kiara Worth

    Member of the “Friends of Science” campaign wears a pin in Bonn. Photo: IISD/ENB – Kiara Worth

    In Bonn this summer, the coalition that wants to align AR7 with the 2028 stocktake – which includes diplomats from Fiji, Nepal, the European Union, Switzerland, Sierra Leone and Panama – vowed to ensure that decision-making in the UN climate process remains based on the “best available science”, including the IPCC assessment reports.

    They pointed the finger at “the usual suspects” but stopped short of singling out any countries at the public press conference. Discussions in the previous week had seen Saudi Arabia and India play down the centrality of IPCC reports in the UN stocktake and oppose calls in draft texts to encourage scientific work on scenarios to limit an overshoot of the 1.5C warming goal.

    Bonn upset fuels further tension

    A campaigner with knowledge of internal discussions told Climate Home News that many civil society groups from some of the world’s most vulnerable nations, including the Pacific islands, had expected CAN International to back calls in Bonn defending the centrality of the IPCC in UN climate policy-making.

    Despite this, a day before the “Friends of Science” press conference, CAN published an ECO newsletter that did not mention the issue. Instead, it voiced surprise over the claims of an attack on science happening in the negotiations and accused some of the IPCC’s loudest-defending governments of hypocrisy for continuing to expand fossil fuels and not delivering “fair shares” of emissions cuts and finance to the developing world.

    “We were really shocked we could not find a common position and then this jarring narrative was being pushed,” the campaigner added.

    After divisions hardened in Bonn, Hare said his organisation was approached by “very upset” CAN members from various regions about the stance taken by the network’s international leadership on the issue.

    Industry and NGOs lobby to weaken UN carbon credit rules in “coordinated” push

    While Climate Home News understands that internal discussions have continued during the summer, including at a CAN leadership meeting in Nairobi in recent days, the campaigner said that CAN International’s endorsement of the recent webinar that directly challenged the “Friends of Science” coalition did not send a reassuring signal.

    Some observers said they feared it would inflame tensions over how climate science is defined and utilised for policy purposes, with consequences reaching well beyond Bonn.

    In a statement to Climate Home News, Essop said that “at a time when communities are experiencing the most horrific impacts of climate chaos, our collective energy must turn to solutions such as filling the Loss and Damage Fund, the phasing out of fossil fuels led by the Global North, and justice for people who are least responsible for this climate emergency”.

    The post As science comes under attack at UN talks, climate movement splits over how to respond appeared first on Climate Home News.

    As science comes under attack at UN talks, climate movement splits over how to respond

    Continue Reading

    Climate Change

    Q&A: What can – and cannot – be said about global warming’s role in the 2026 Himalayan floods

    Published

    on

    Article Contents

    On the morning of 26 August, flash floods surged through a Himalayan border region of Nepal and the Chinese region of Tibet, killing more than 1,300 people, with thousands still missing.

    In the days since the floods, scientists have examined satellite imagery, drone footage and seismic data in order to understand and explain the forces behind the event.

    While initial theories pinned the flood on a glacial collapse, scientists now understand the event as a “multi-hazard cascade”, which began with a bedrock collapse.

    Some climate sceptics have tried to use this to falsely claim that human-caused climate change had no impact on the event.

    Yet, scientists have noted that, while no formal attribution study has been carried out thus far, warming is making such ice-rock avalanches in the region more likely.

    Researchers have highlighted how rapid warming is dramatically reshaping Asia’s high-mountain region – and identified rising temperatures, glacier retreat and permafrost thaw as factors that may have all contributed to the disaster.

    Balendra Shah, Nepal’s prime minister, has called the floods a “serious signal that…the risks we must bear in the Himalayan region are increasing” due to climate change.

    Here, Carbon Brief unpacks what scientists currently know about the causes of the catastrophic event and what they can – and cannot – say about the role of climate change.

    What happened?

    A report published on 28 August by the HiRisk scientific consortium of high mountain experts detailed the events that led to the flash floods.

    It said that events were set in motion on 26 August when a mass of bedrock, as well as the glacier ice on top of it, broke off a slope of Langtang-Lirung mountain in the Nepalese Himalaya, plunging from approximately 5,200 metres above sea level to the valley floor at 3,000 metres.

    The landslide shook the ground hard enough that, at 8:37am Nepal local time, the US Geological Survey (USGS) initially reported a magnitude 4.4 earthquake. Later that day, it clarified the shaking was caused by glacier collapse and debris flow, equivalent to a magnitude 5.2 earthquake.

    On the valley floor, the melting ice, water and debris slammed into the Lhende Khola river, a high-altitude river that runs along Nepal’s border with China.

    Known downstream as the Bhote Koshi river in Nepal and the Poiqu or Poqu in China, the Lhende Khole feeds a network of rivers across Nepal and the Chinese region of Tibet, including the Trishuli river. (In China, the Lhende Khola is known as the Donglin Tsangpo.)

    This image shows a map of Nepal.
    The designations employed and the presentation of the material on this map do not imply the expression of any opinion whatsoever on the part of Carbon Brief concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Credit: Carbon Brief.

    A large “debris” lake was briefly formed on the valley floor. When this lake burst, a wall of water and rock travelled downstream, killing more than a thousand people and destroying settlements, roads, bridges, hydropower plants and border posts across Nepal and Tibet.

    HiRisk said that the floodwave travelled down rivers as fast as 30km an hour (around 19 miles per hour) and reached Mugling – a Nepalese town more than 130km downstream – at around 1pm local time.

    A separate report from the Center for Land Surface Hazards in the US noted that the flood moved “exceptionally fast, was sediment-laden and extreme in scale”. For example, in the Nepalese municipality of Galchhi, the Trishuli river rose by nine metres in 30 minutes, it said.

    Writing in the Conversation, Dr Umesh Haritashya, a glaciologist at the University of Dayton in Ohio, explained that the disaster “wasn’t finished when the first wall of water passed [on 26 August]”.

    He continued that a new “barrier lake” – estimated to hold a few million cubic metres of water – had developed in a location where two rivers meet in Tibet before crossing into Nepal. This lake burst on 28 August and the river rose again, he said.

    On 4 September, the chief of Nepal’s National Disaster ​Risk Reduction and Management Authority, told Reuters that property and infrastructure worth “at least” $2.5bn (£1.9bn) had been lost. Dharma Raj Upreti estimated the cost to build roads and temporary shelters, provide drinking water and ⁠restore power would be around $53m (£39m).

    How did bedrock collapse trigger the flash floods?

    In the immediate aftermath of the floods, initial reports suggested that the trigger was a collapsing glacier or earthquake in the high mountains of Nepal.

    After confirming that a seismic tremor was as a result of falling rock and ice, the USGS said the trigger was likely a “glacial collapse and debris flow”. This was widely picked up by the media.

    Subsequently, satellite imagery revealed that an “enormous chunk of the mountainous bedrock” beneath the glacier had also given way, reported the New York Times.

    Dr Kristen Cook, a geomorphologist at the Université Grenoble Alpes in France, told the newspaper:

    “The rock that the glacier was sitting on collapsed…It was a much larger collapse than we were initially able to see in the satellite imagery.”

    The result was a “deluge of rock and ice, which pulverized into mud and water as it surged down the mountainside”, the newspaper said.

    Dr Jakob Steiner a geoscientist at the University of Graz in Austria, tells Carbon Brief:

    “It was not a glacier that collapsed. It was the mountain below the glacier that collapsed and the glacier had no other chance but to go with it because it was sitting on top of it.

    “The trigger for that is something that we are not 100% certain about, but, in the end, it very much looks like simply a mechanical failure of the rock material because of stressors that have built up over a long period of time.”

    Failures of “bedrock” – the hard, solid rock that sits below looser rocks and soil – are an “increasingly common occurrence”, says Prof Bethan Davies, a professor of glaciology at Newcastle University. She tells Carbon Brief:

    “These massive landslides occur in mountain regions, commonly following rapid deglacierisation [the melting away of a glacier]. Similar events happened in the Chamoli event in 2021 [in the Indian Himalaya] and in the Blatten landslide last year in Switzerland. They’ve also occurred recently in Alaska.”

    With a shift in focus from the failure of a glacier to the bedrock underneath, some climate sceptics seized on the development to falsely claim that climate change had not played any role in the disaster.

    These include Dr Matthew Wielicki, recently appointed by the Trump administration to lead the US Global Change Research Program, on Twitter, as well as former Conservative peer and climate-sceptic commentator Matt Ridley in the Spectator.

    However, scientists have highlighted the likely contribution of rapid warming in the region. These factors include the thawing of permafrost and glacier retreat. (For more, see sections below).

    Fundamentally, “this would have been a much less significant tragedy if it had been just a rock-slope failure”, notes Davies.

    The initial landslide took a mixture of rock and ice into a valley that “contains buried ice” as well, she says, providing the water that “resulted in the hyperconcentrated flow, which took so many lives”.

    How have temperatures risen in the affected region?

    Global temperatures have risen by roughly 1.4C since the pre-industrial period. However, this increase is not uniform across the planet, with some regions warming faster than others.

    A study published in Global and Planetary Change in June 2026 investigated changes in the Langtang catchment – a river basin in central Nepal, in which the Langtang-Lirung mountain is located, which eventually drains into the Ganges. Around one-quarter of the area is made up of glaciers.

    The paper found that glacial areas of the catchment – found at 4,000 metres above sea level – warmed at 0.31C per decade over 1960-2023. This was “more than three times” the rate observed at a lower elevation weather station, the authors said.

    Looking in more detail at the site of the glacial collapse, Dr Robert Rohde, chief scientist for Berkeley Earth, used ERA5 reanalysis data to show how temperature has changed at the 5,200-metre elevation site where the mass of ice and rock broke loose.

    Rohde’s analysis found that June-to-August temperatures have been rising at the site of the glacier collapse since the year 1940, with 2026’s summer the fourth warmest on record, behind 2024, 2025 and 2022. This is shown in the graph below.

    Average summer (June-August) temperature at the ice-rock avalanche site over 1940-2026.
    Average summer (June-August) temperature at the ice-rock avalanche site over 1940-2026. Data source: Rohde, Bluesky (2026)

    Rohde also found that the days leading up to the disaster recorded the hottest August temperatures ever experienced at the site. This is shown in the graph below.

    Daily average temperature, from 1 June-1 September, at the glacier collapse site.
    Daily average temperature, from 1 June-1 September, at the ice-rock avalanche site. 2026, 2025 and 2024 are shown in dark, mid and light blue. All other years from 1940-2023 are shown in grey. Source: Rohde, Bluesky (2026)

    On social media, Rohde stated:

    “Given the warming trend, this Nepali glacier had probably been thinning and weakening for years, or even decades. But it ultimately failed during the warmest week in one of its warmest years on record. It would be a hell of a coincidence if global warming wasn’t at least partially to blame.”

    How have rising temperatures affected mountain stability?

    Many experts have linked warming temperatures in the region to thawing permafrost – ground that has been frozen for at least two consecutive years, whose thickness ranges from less than one metre to more than a kilometre.

    Steiner is part of a research team that has been using sensors to monitor permafrost in the region since 2014. He tells Carbon Brief that it is “pretty clear” the permafrost has been thawing “very actively” at elevations as high as 5,200 metres above sea level “for many years”. He adds:

    “This means that the ground has, over the last decades, moved from being in a solid state into – at least, periodically during the warm season – patchy ground where some is frozen and some isn’t…

    “If you have frozen ground next to non-frozen ground, you have dynamics happening between that because there are different densities and there’s movement happening, which is conducive to interventional failure – and that we know from many other cases.”

    Davies also points to the “degradation” of perennially frozen ground as a factor in the disaster:

    “This permafrost acts as a glue to hold together the rocks and, as it melts, the rock can become weakened.”

    Permafrost thaw can also result in saturated ground, says Davies, which adds “pressure in the joints” of rock and can “facilitate” failure. She continues:

    “Sources of the water include melting permafrost and meltwater from the overlying glacier. We know that this event happened during a period of warmth, but in the absence of heavy precipitation, pointing to ice melt as the source of water.”

    A 2025 study of rock and ice avalanches in High Mountain Asia found that more than two-thirds started in areas “where permafrost is probable”.

    How have glaciers retreated in the affected region?

    Glaciers – frozen rivers of ice holding three-quarters of the global freshwater supply – are extremely vulnerable to climate change.

    In the Himalaya, the rate of glacier retreat has doubled since the late 20th century, according to a 2019 study in Science Advances.

    The Global and Planetary Change study found that glacier area loss rates in the Langtang catchment increased more than fourfold from 1964 to 2023 – with melting accelerating after 2000.

    It added that glaciers in the region also experienced “fragmentation” and “widespread thinning” over this period.

    The study noted that this loss “coincided with elevation dependent warming”.

    The figure below provides an overview of glacier loss in the Langtang catchment over 1964-2023, with orange, red and dark red indicating areas of retreat.

    In addition, green dots note points of glacier fragmentation, while blue dots show separation and pink show disconnection.

    Glacier loss in the Langtang catchment over 1964-2023.
    Glacier loss in the Langtang catchment over 1964-2023. Orange, red and dark red indicate areas of retreat. Green dots note points of glacier fragmentation, while blue dots show separation and pink show disconnection. Credit: Silwal et al. (2026)

    In comments released by the University of Reading, Prof Maria Shahgedanova, a climate scientist researching climate impacts on mountain glaciers, said that the glacier involved in the floods had “retreated by approximately 450 metres between 1990 and 2020”.

    She adds that this “potentially reduce[d] the mechanical support provided by the glacier to the underlying rock slope”.

    Speaking to Carbon Brief, Davies reiterates that the retreat of the glacier is “potentially a contributing factor” to the bedrock collapse and subsequent disaster.

    This is because the removal of the glacier from the lower slopes leaves the “upper rock slopes less stable”, she says.

    The most recent assessment by the International Centre for Integrated Mountain Development said that glaciers in the Hindu Kush Himalaya region are “rapidly shrinking” as a result of climate change. (This region extends 3,500km over Afghanistan, Bangladesh, Bhutan, China, India, Myanmar, Nepal and Pakistan.)

    It said this loss is threatening the safety of the nearly two billion people, including by increasing the risk of “glacial lake outburst floods” (GLOFs). A GLOF is a sudden and catastrophic release of meltwater from a glacial lake.

    Although this disaster was not caused by a GLOF, it is known that climate change is making such events more likely.

    Can the event be attributed to climate change?

    In the wake of the flash floods, climate campaigners, media outlets and Nepalese politicians have linked them to human-caused climate change.

    However, many climate scientists have cautioned that it is too early to say precisely how climate change impacted the disaster.

    Davies tells Carbon Brief:

    “These events happen so quickly that the exact causes and drivers can take a little time to uncover, especially if the event was a surprise and there had been no monitoring system in place.”

    When trying to determine the role human-caused climate change played in the intensity or likelihood of extreme weather, scientists turn to the field of “attribution science”.

    To date, no formal rapid attribution study has been produced that attempts to quantify whether – and how – climate change contributed to the event.

    Scientists have noted that climate attribution of ice-rock avalanches – which are typically driven by a variety of factors – remains limited, in part because of the lack of a long-term observational record of previous collapses in high mountain areas.

    Meanwhile, the studies that do exist stop short of directly linking such disasters to climate change. For example, the authors of a 2021 study into the Chamoli ice-rock avalanche concluded that “we cannot attribute this individual disaster specifically to climate change”.

    However, they added, the “possibly increasing frequency of high-mountain slope instabilities can likely be related to observed atmospheric warming and corresponding long-term changes in cryospheric conditions (glaciers and permafrost)”.

    In the aftermath of the disaster, many researchers have similarly highlighted that climate change could not be singled out as the cause of the disaster, even if warming likely increased the probability of its occurrence.

    On the Climate Brink substack, Carbon Brief’s climate science contributor Dr Zeke Hausfather noted that a “definitive single-event attribution” of the more recent disaster “may never be possible” due to the “messy causality of rock-ice avalanches”.

    However, he added that both the existing scientific literature and “essentially every scientist working on these hazards point in the same direction” – namely, that warming is making such events more likely in the Himalaya.

    Steiner tells Carbon Brief it might be possible to attribute different factors that played a role in the disasters to climate change – for instance, the recession of the glacier – but it would be more difficult to do so for the event as a whole.

    Part of the reason for this, he says, is that rock failures in this region of the Himalaya have occurred for millennia, well before humans started altering the climate.

    However, he continues:

    “The physics of it is not something that has been made possible by climate change. This could have happened without it. But the chance of it happening – and the likelihood of it happening five years after a previous, similar event [in Chamoli] – we, as the scientific community, can be pretty confident about that [being increased because of a changing climate].

    “This is because so many of the changes that we know are related to climate change can potentially drive the build-up to eventual failure.”

    Ultimately, says Davies, a “careful attribution study is needed, but it is hard to argue that the rapidly warming climate is not having an effect in these regions”. She adds:

    “A single event may have multiple drivers, but we are seeing an increase in these events and are likely to see more as the permafrost and glacier melt continues.”

    The post Q&A: What can – and cannot – be said about global warming’s role in the 2026 Himalayan floods appeared first on Carbon Brief.

    Q&A: What can – and cannot – be said about global warming’s role in the 2026 Himalayan floods
    Continue Reading

    Climate Change

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

    Published

    on

    Chinese industry is beginning to shift from fossil fuels to clean electricity, with wind, solar and batteries progressively displacing coal, oil and gas across the industrial sectors that made the country the world’s factory and largest carbon emitter, a new analysis shows.

    Clean electricity met all of China’s demand growth in 2025 and coal generation fell for the first time in a decade, even as electricity demand rose by 5%, the report found.

    Despite a rebound in coal power generation in the first half of 2026, the analysis by global energy think-tank Ember found the growth in clean electricity illustrates a longer-term shift: a massive build-out of wind, solar energy and battery storage and deepening electrification of the economy are starting to make a dent in the fossil-fuel energy system supporting China’s industrial base.

    China keeps Indonesia’s battery dream afloat but future less certain

    The research identifies early signs that a structural transformation of China’s industrial economy from coal, oil and gas to clean electricity is underway, even if changes on the ground are not yet reflected in national data.  

    “The energy foundation of the Chinese industrial economy is shifting,” Muyi Yang, a senior energy analyst at Ember and the report’s lead author, told Climate Home News.

    “Fossil fuels are progressively being replaced in the many functions they have historically assumed. Because of that, fossil fuel peaking is increasingly coming into view,” he said.

    Electrifying industry

    Coal generation has stopped growing in 17 of the 26 provinces and regions analysed by Ember between 2021 and 2025. This includes industrial centres such as Hunan in southern China and Shandong – home to energy-intensive industries like cement production. Together, these regions are home to more than half of China’s thermal power capacity.

    A greater share of the Chinese economy is now running on electricity than in other major economies, accounting for 29% of final energy consumption in 2024, compared with about 23% in Europe and 21% in the US. Less than half of China’s electricity was generated from coal in the first half of the year.

      Meanwhile, fossil fuel use has fallen in eight of 11 tracked industrial sectors, declining between 26% and 71% from peak consumption levels across fossil fuel extraction, manufacturing industries such as textiles, machinery and food and beverages, transport equipment and chemical materials.

      Earlier this year, German company BASF, the world’s largest chemical producer, opened a new facility in southern China, which is fully supplied by renewable energy. The company said emissions from the site could be 50% lower than conventional petrochemical facilities.

      An employee walks near fields of heliostat mirrors at the site of Dunhuang Shouhang 100MW Tower Solar Thermal Power Generation Project, during an organised media tour to Dunhuang Photovoltaic Industrial Park, in Gansu province, China (Photo: REUTERS/Tingshu Wang)

      An employee walks near fields of heliostat mirrors at the site of Dunhuang Shouhang 100MW Tower Solar Thermal Power Generation Project, during an organised media tour to Dunhuang Photovoltaic Industrial Park, in Gansu province, China (Photo: REUTERS/Tingshu Wang)

      In easier-to-electrify sectors such as machinery, electronics and textiles, electricity now supplies about three-quarters of final energy consumption, Ember found.

      Fossil fuel use is also showing signs of flattening in the metals smelting and processing sector – one of the most fossil-intensive parts of the economy – offering “encouraging signs” that the transformation is starting to take hold in harder-to-abate sectors, said Yang.

      “If that is happening in more and more provinces, and more and more economic sectors that means that fossil fuels are progressively being squeezed out of the energy system,” he said.

      “Growing by greening”

      China’s vast cleantech manufacturing power has become an engine for growth in its own right, spurring investment, creating jobs and generating export revenues.

      Yang described this “growing-by-greening” dynamic as “turning each step of the transition into a source of strength for the next”.

      China and Brazil join pledge to triple global nuclear energy capacity

      For Li Shuo, director of China Climate Hub at the Asia Society Policy Institute, this is part of what makes China’s lead in manufacturing clean energy equipment “irreversible”, comparing its growth with that of a rainforest, where different parts of the ecosystem thrive by reinforcing one another.

      The early success of deploying wind and solar helped drive down electricity costs, which created favourable conditions for the rapid adoption of electric vehicles (EVs) and in turn boosted demand for batteries that are now critical to balance the grid.

      A livestreamer promotes coal during a livestreaming session for Huaze Coal Industry on the Douyin app (Photo:REUTERS/Florence Lo/Illustration)

      A livestreamer promotes coal during a livestreaming session for Huaze Coal Industry on the Douyin app (Photo:REUTERS/Florence Lo/Illustration)

      An oversupply of renewable energy incentivised industrial players to benefit from cheap and readily available clean power generation, encouraging innovative solutions to electrify other parts of the economy. In the transport sector, for example, electrification is moving from passenger vehicles to harder-to-electrify trucks.

      This abundance of cheap green energy is also making China competitive in what has long been seen as the anchor of Western competitiveness, Li said.

      Stalling fossil fuel use

      At the same time, China’s huge legacy fossil fuel generation capacity is still expanding, even as coal power plants are being used less intensively.

      China brought 30 GW of new coal power capacity into operation in the first six months of the year and coal-fired generation rose 3% over the same period after local governments fast-tracked coal projects to prevent a repeat of severe power shortages in 2021.

      Solar surge kept fossil electricity flat in 2025 as China and India made ‘historic’ shift

      A further 274 GW of coal capacity is either under construction or has permits to be built while vast amounts of solar and wind power that could not be absorbed by the grid have gone to waste in the first half of the year.

      “This doesn’t mean that the transition is losing steam,” said Yang, arguing that China is now grappling with some of the more complex aspects of the transition.

      A recent analysis by the Centre for Research on Energy and Clean Air (CREA) for Carbon Brief found that China’s CO2 emissions from fossil fuels and cement have plateaued for more than two years following a peak in March 2024. Ember found that on a 12-month moving average, coal generation has been stalling since then, following years of continuous expansion.

        In the second quarter of the year, CO2 emissions fell by 1% after China’s oil consumption plummeted 9% as the US-Iran war prevented the transport of oil cargoes from the Gulf through the Strait of Hormuz.

        The electrification of the transport sector, particularly electric trucks, was the biggest driver in displacing oil demand as the conflict in the Middle East accelerated the transition.

        A lesson in sequencing

        China’s bumpy transition offers a useful lesson for other countries at an earlier stage of their transition, said Xunpeng Shi, president of the Sydney-based International Society of Energy Transition Studies (ISETS), a global network of professionals that shares research and fosters collaborations.

        “Build quickly enough so that clean electricity can start taking over and prepare for the pressure on the fossil system before it arrives, because that is the part nobody has done easily,” he said.

        For countries that are heavily reliant on revenue from fossil fuel exports, a peak in Chinese fossil fuel use weakens the assumption of rising demand on which investments have long been made.

        “For them, the time to plan for that is now, while the revenues are still there,” he said.

        The post China’s industrial engine starts to break its fossil fuel habit appeared first on Climate Home News.

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

        Continue Reading

        Trending

        Copyright © 2022 BreakingClimateChange.com