Welcome to Carbon Brief’s Cropped.
We handpick and explain the most important stories at the intersection of climate, land, food and nature over the past fortnight.
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Key developments
COP16 kicks off in Cali
COLOMBIA CALLING: Representatives from 175 countries are meeting in Cali, Colombia from 21 October to 1 November for the COP16 biodiversity summit, with “life on Earth on the agenda”, the New York Times reported. At the talks, countries will grapple with how to put the Kunming-Montreal Global Biodiversity Framework – often described as the “Paris Agreement for nature” – into action, alongside debates on finance for developing countries and how to best share the benefits from genetic information, the newspaper said. Carbon Brief has produced an interactive grid of where each party stands on the key negotiating issues and a live tracker of the texts under negotiation. On Tuesday, Carbon Brief’s team of five journalists on the ground in Cali held an online webinar on the key issues up for discussion at the summit. A recording is available.
HIGH-LEVEL PRESENCE: Mongabay reported that around 23,000 delegates are attending COP16, with presidents or heads of state from Brazil, Guatemala, Guinea-Bissau, Haiti, Mozambique, Peru and Suriname expected to be present. (The Earth Negotiations Bulletin noted that the summit “is the largest UN biodiversity conference to date”.) The outlet added that the conference also aims to adopt a work programme for Indigenous peoples and local communities. El Espectador reported that the Development Bank of Latin America (CAF) will invest $300m in the protection of important ecosystems across the region, including the Amazon, the Antarctic and Patagonia. The president of CAF, Sergio Díaz-Granados, said they will deliver a tool for identifying high-quality projects to be funded.
PLANS AND PLEDGES: A joint investigation by Carbon Brief and the Guardian found that 85% of countries had failed to meet a UN request to publish new pledges on how they plan to tackle biodiversity decline before COP16. Just 25 nations and the EU released new national biodiversity strategies and action plans (NBSAPs) ahead of the summit. Since then, a further 10 countries have come forward with NBSAPS, including COP16 host Colombia. Colombia’s NBSAP pledges to extend protected areas from 24 to 34% of national territory and increase the bioeconomy’s contribution to national GDP from 0.8 to 3%. Carbon Brief will be updating its NBSAP tracker later this week.
Water woes
STRESSED OUT: New analysis from the US-based thinktank the World Resources Institute found that “one-quarter of the world’s crops are grown in areas where the water supply is highly stressed, highly unreliable or both”. Three staple crops that together provide more than half of the world’s calories – rice, wheat and corn – are “particularly vulnerable”, according to the analysis. It added that both rainfed and irrigated crops “face growing threats”, with the former imperilled by “erratic weather patterns” and the latter facing “increasing competition over shared water supplies”. According to the report, “demand for water to irrigate crops is projected to rise by 16% by 2050, compared to 2019”.
TRAGEDY OF THE COMMONS: Covering the report, Grist wrote that water stress “stems partly from a common tendency to take water for granted and treat it like an endlessly renewable, on-demand resource”. Sam Kuzma, one of the authors of the report, told the publication: “Because we don’t put a value on water, you can irrigate and not pay much at all for the water that you’re using…That means we can be pretty reckless with how we’re growing and in what environments.” The analysis “spells trouble for global food security”, Grist wrote, noting that major agricultural exporters, including India, are among the countries most at risk of increasing water stress.
ROME DECLARATION: At the World Food Forum last week, hosted by the UN Food and Agriculture Organization in Rome, member states adopted the Rome Declaration on Water Scarcity in Agriculture. According to Down to Earth, “the countries committed to mobilise greater political support in terms of policies, legal and institutional frameworks, access to financing and responsible water governance”. FAO director general Dr Qu Dongyu told the plenary session: “The solutions we develop must reflect the interconnected nature of water security, agrifood systems and climate resilience.” According to the FAO press release, “by 2050, more than half the global population will live in areas at risk of water scarcity at least one month a year”.
Spotlight
‘The planet doesn’t have time to lose’
Carbon Brief’s entire food, land and nature team is on the ground in Cali, Colombia to report on the UN biodiversity talks. In this spotlight, Carbon Brief outlines what has happened so far at COP16.
Hola from Cali, where the UN biodiversity summit COP16 has kicked off this week.
Thousands of negotiators, observers, activists and journalists have descended on the city – the country’s “salsa capital” – for detailed nature discussions over the coming two weeks.
Far from the harsh lighting and long corridors of other COPs, Cali delegates are treated to mountain views in the distance and large overhead fans staving off the October heat in one of the world’s most biodiverse countries.

It has not all been smooth sailing so far, however, with packed buses transporting sweating delegates, congested roads, poor internet connections and winding security queues on the first day of the summit.
COP16 comes two years after countries signed off on a global biodiversity deal aiming to halt and reverse nature loss by the end of this decade.
Since this agreement, countries have been figuring out how to put in place these goals on a national level.
Hot topics
Negotiators are discussing a wide range of issues, including the implementation of biodiversity goals and how to scale up nature finance.
Bernadette Fischler Hooper, the head of global advocacy at WWF, told a press briefing on 21 October that resource mobilisation was hotly debated at the pre-COP16 implementation talks last week.
For example, countries are split on whether to develop a new global fund for biodiversity – to be controlled by the COP – or stick with the current fund. Negotiators are trying to break the “deadlock” on this issue over the next two weeks, she noted.
Other discussions centre around agreeing rules around digital access to genetic information, Indigenous peoples’ rights and monitoring for the Global Biodiversity Framework.
“The planet doesn’t have time to lose,” Colombian environment minister and COP16 president Susana Muhamad said at the summit’s opening ceremony.
Speaking via telecast, UN chief António Guterres also urged countries to “make peace with nature” – referencing the COP16 theme.
Security fears
More than 10,000 police officers are in place across the city amid threats from a rebel group to disrupt COP16.
Speaking at a press conference on 21 October, Cali’s mayor, Alejandro Eder, said that security was the first issue tackled when the city was selected to host COP16.
Eder assured the safety of COP16 attendees, but Colombian president Gustavo Petro last week said he was “nervous” that “something bad” could happen at the start of the summit, according to Colombia’s El Heraldo newspaper.
Eder noted that COP16 was organised in “record time”, given that cities usually have two years to prepare. (Turkey withdrew as COP16 host last year after severe earthquakes killed more than 40,000 people. Cali was confirmed as the new host in February 2024.)
Elsewhere, nearly 2,000 Indigenous peoples from Colombia took to the streets of Cali on 21 October calling for nature to be respected. More protests are expected throughout the summit.
Carbon Brief’s team of five nature journalists will be closely tracking the negotiations on the ground in Cali over the next two weeks.
News and views
REEF IT AND WEEP: The mass bleaching of coral reefs worldwide since early 2023 “is now the most extensive on record”, the US National Oceanic and Atmospheric Administration (NOAA) told Reuters. Satellite data showed a “staggering 77%” of global reefs so far have “been subjected to bleaching-level heat stress…as climate change fuels record and near-record ocean temperatures across the world”, the newswire added. “We’ve eclipsed the previous record by 11.3% and…in half the amount of time,” Dr Derek Manzello, coordinator of NOAA’s Coral Reef Watch, told Axios. CNN said that scientists have called for an emergency session on coral reefs at COP16 “in response to the bleaching record”.
‘NATURE-POSITIVE’: A record number of companies are expected to be at COP16, and they are “increasingly touting their ambitions to be ‘nature-positive’ alongside their net zero targets”, the Financial Times wrote. According to the newspaper, which looked at the rapid proliferation of the term “nature-positive” since COP15 in 2022, it implies “halting and reversing biodiversity loss, targeting an overall increase in nature…by 2030, relative to a 2020 baseline”. However, it adds that scientists and environmentalists are worried that states and firms “are starting to brandish the term as a buzzword” before a comprehensive and credible definition of nature-positive and its metrics exists.
GLOBAL ECOSYSTEM ATLAS: At COP16, the Group on Earth Observations (GEO) launched the proof-of-concept of the Global Ecosystems Atlas, a tool for mapping and monitoring the world’s ecosystems. According to a GEO press release, the atlas provides information on ecosystem extent, condition and potential risks, drawing on inputs from high-quality maps and new maps based on field data and AI. The atlas aims to support “tracking [progress on] the Global Biodiversity Framework, develop national ecosystem maps…and inform private sector reporting on nature-related risks”, the press release added.
THE ROOF IS ON FIRE: Forest fires have intensified and become more widespread “amid global heating, particularly in the high northern latitudes such as Canada and Siberia”, researchers wrote in the Conversation. Their new study found that global carbon emissions from forest fires have grown by 60% over the past two decades, with the “largest contributions com[ing] from fires in Siberia and western North America”, the authors added. “We had to check the calculations because it’s such a big number,” lead author Dr Matthew Jones told the New York Times. Elsewhere, research covered by Carbon Brief revealed that a long-term decline in area burned globally by wildfires due to land-use change has almost entirely been offset by increases caused by warming.
DYING PLANET: Wildlife populations worldwide have “plunged” by an average of 73% in the last 50 years according to the latest Living Planet report, the Guardian reported. However, it adds that the Living Planet index is “weighted in favour of data from Africa and Latin America” and the metric has faced criticism for “potentially overestimating wildlife declines”. Vox, covering the report, wrote that it “underscores [that] we are living in a time of profound biodiversity loss” and that “calculating a single figure to encompass all of this loss isn’t easy”. At the same time, scientists not involved in the report called its metrics “misleading”, the story added. A ZSL scientist quoted by Vox said that “it’s also possible that the [Living Planet Index] actually underestimates the scale of declines”. Our World In Data published a guide to understanding the index and “what it does and doesn’t mean”.
Watch, read, listen
FOREST LOSS: Mongabay looked at how Indonesia’s plan to boost renewable energy could lead to Indigenous communities losing “huge swathes of their forests to biomass plantations”.
EYES ON SOUTH AMERICA: Analysis in the Guardian discussed how Colombia and Brazil “have the chance of a lifetime to save the Amazon” in hosting key upcoming global events.
SNAIL’S PACE: Ahead of COP16, NPR’s All Things Considered radio show spoke to wildlife biologist Dr David Sischo about what it’s like to work with Hawaii’s endangered tree snails.
COUNTING MOTHS: Sundance award-winning documentary “Nocturnes” followed ecologist Dr Mansi Mungee counting hawk moths in the lush forests of north-eastern India.
New science
- A new study found that nearly half of the proposed indicators for measuring progress on the Kunming-Montreal Global Biodiversity Framework could involve community-based monitoring programmes. Researchers in Nature Sustainability wrote that greater involvement of citizens could “enhance local to national decision-making”.
- A 1% increase in deforestation in the Brazilian Amazon was linked with a 6.3% rise in malaria cases the following month, a new study in Proceedings of the National Academy of Sciences found. Using sub-annual data, researchers showed that deforestation increases malaria transmission, especially in areas with high amounts of forest cover.
- Increasingly dry conditions under a changing climate will pose a significant threat to frogs and other water-sensitive animals, according to new research in Nature Climate Change. Researchers combined maps of drought risk and frog and toad habitats to find that nearly 7% of frog and toad habitats will become “arid-like” by the end of the century.
In the diary
- 21 October-1 November: COP16 UN biodiversity conference | Cali, Colombia
- 25 October: Kiribati presidential election
- 4-5 November: UN Water meeting | New York
- 5 November: US election
- 11-22 November: COP29 UNFCCC climate conference | Baku, Azerbaijan
Cropped is researched and written by Dr Giuliana Viglione, Aruna Chandrasekhar, Daisy Dunne, Orla Dwyer and Yanine Quiroz. Please send tips and feedback to cropped@carbonbrief.org.
The post Cropped 23 October 2024: COP16 kicks off; Water woes; Coral bleaching ‘worst ever’ appeared first on Carbon Brief.
Cropped 23 October 2024: COP16 kicks off; Water woes; Coral bleaching ‘worst ever’
Climate Change
The 2026 budget test: Will Australia break free from fossil fuels?
In 2026, the dangers of fossil fuel dependence have been laid bare like never before. The illegal invasion of Iran has brought pain and destruction to millions across the Middle East and triggered a global energy crisis impacting us all. Communities in the Pacific have been hit especially hard by rising fuel prices, and Australians have seen their cost-of-living woes deepen.
Such moments of crisis and upheaval can lead to positive transformation. But only when leaders act with courage and foresight.
There is no clearer statement of a government’s plans and priorities for the nation than its budget — how it plans to raise money, and what services, communities, and industries it will invest in.
As we count down the days to the 2026-27 Federal Budget, will the Albanese Government deliver a budget for our times? One that starts breaking the shackles of fossil fuels, accelerates the shift to clean energy, protects nature, and sees us work together with other countries towards a safer future for all? Or one that doubles down on coal and gas, locks in more climate chaos, and keeps us beholden to the whims of tyrants and billionaires.
Here’s what we think the moment demands, and what we’ll be looking out for when Treasurer Jim Chalmers steps up to the dispatch box on 12 May.
1. Stop fuelling the fire
2. Make big polluters pay
3. Support everyone to be part of the solution
4. Build the industries of the future
5. Build community resilience
6. Be a better neighbour
7. Protect nature
1. Stop fuelling the fire

In mid-April, Pacific governments and civil society met to redouble their efforts towards a Fossil Fuel Free Pacific. Moving beyond coal, oil and gas is fundamental to limiting warming to 1.5°C — a survival line for vulnerable communities and ecosystems. And as our Head of Pacific, Shiva Gounden, explained, it is “also a path of liberation that frees us from expensive, extractive and polluting fossil fuel imports and uplifts our communities”.
Pacific countries are at the forefront of growing global momentum towards a just transition away from fossil fuels, and it is way past time for Australia to get with the program. It is no longer a question of whether fossil fuel extraction will end, but whether that end will be appropriately managed and see communities supported through the transition, or whether it will be chaotic and disruptive.
So will this budget support the transition away from fossil fuels, or will it continue to prop up coal and gas?
When it comes to sensible moves the government can make right now, one stands out as a genuine low hanging fruit. Mining companies get a full rebate of the excise (or tax) that the rest of us pay on diesel fuel. This lowers their operating costs and acts as a large, ongoing subsidy on fossil fuel production — to the tune of $11 billion a year!
Greenpeace has long called for coal and gas companies to be removed from this outdated scheme, and for the billions in savings to be used to support the clean energy transition and to assist communities with adapting to the impacts of climate change. Will we see the government finally make this long overdue change, or will it once again cave to the fossil fuel lobby?
2. Make big polluters pay

While our communities continue to suffer the escalating costs of climate-fuelled disasters, our Government continues to support a massive expansion of Australia’s export gas industry. Gas is a dangerous fossil fuel, with every tonne of Australian gas adding to the global heating that endangers us all.
Moreover, companies like Santos and Woodside pay very little tax for the privilege of digging up and selling Australians’ natural endowment of fossil gas. Remarkably, the Government currently raises more tax from beer than from the Petroleum Resource Rent Tax (PRRT) — the main tax on gas profits.
Momentum has been building to replace or supplement the PRRT with a 25% tax on gas exports. This could raise up to $17 billion a year — funds that, like savings from removing the diesel tax rebate for coal and gas companies, could be spent on supporting the clean energy transition and assisting communities with adapting to worsening fires, floods, heatwaves and other impacts of climate change.
As politicians arrive in Canberra for budget week, they will be confronted by billboards calling for a fair tax on gas exports. The push now has the support of dozens of organisations and a growing number of politicians. Let’s hope the Treasurer seizes this rare window for reform.
3. Support everyone to be part of the solution
As the price of petrol and diesel rises, electric vehicles (EVs) are helping people cut fuel use and save money. However, while EV sales have jumped since the invasion of Iran sent fuel prices rising, they still only make up a fraction of total new car sales. This budget should help more Australians switch to electric vehicles and, even more importantly, enable more Australians to get around by bike, on foot, and on public transport. This means maintaining the EV discount, investing in public and active transport, and removing tax breaks for fuel-hungry utes and vans.
Millions of Australians already enjoy the cost-saving benefits of rooftop solar, batteries, and getting off gas. This budget should enable more households, and in particular those on lower incomes, to access these benefits. This means maintaining the Cheaper Home Batteries Program, and building on the Household Energy Upgrades Fund.
4. Build the industries of the future

If we’re to transition away from fossil fuels, we need to be building the clean industries of the future.
No state is more pivotal to Australia’s energy and industrial transformation than Western Australia. The state has unrivaled potential for renewable energy development and for replacing fossil fuel exports with clean exports like green iron. Such industries offer Western Australia the promise of a vibrant economic future, and for Australia to play an outsized positive role in the world’s efforts to reduce emissions.
However, realising this potential will require focussed support from the Federal Government. Among other measures, Greenpeace has recommended establishing the Australasian Green Iron Corporation as a joint venture between the Australian and Western Australian governments, a key trading partner, a major iron ore miner and steel makers. This would unite these central players around the complex task of building a large-scale green iron industry, and unleash Western Australia’s potential as a green industrial powerhouse.
5. Build community resilience
Believe it or not, our Government continues to spend far more on subsidising fossil fuel production — and on clearing up after climate-fuelled disasters — than it does on helping communities and industries reduce disaster costs through practical, proven methods for building their resilience.
Last year, the Government estimated that the cost of recovery from disasters like the devastating 2022 east coast floods on 2019-20 fires will rise to $13.5 billion. For contrast, the Government’s Disaster Ready Fund – the main national source of funding for disaster resilience – invests just $200 million a year in grants to support disaster preparedness and resilience building. This is despite the Government’s own National Emergency Management Agency (NEMA) estimating that for every dollar spent on disaster risk reduction, there is a $9.60 return on investment.
By redirecting funds currently spent on subsidising fossil fuel production, the Government can both stop incentivising climate destruction in the first place, and ensure that Australian communities and industries are better protected from worsening climate extremes.
No communities have more to lose from climate damage, or carry more knowledge of practical solutions, than Aboriginal and Torres Strait Islander peoples. The budget should include a dedicated First Nations climate adaptation fund, ensuring First Nations communities can develop solutions on their own terms, and access the support they need with adapting to extreme heat, coastal erosion and other escalating challenges.
6. Be a better neighbour
The global response to climate change depends on the adequate flow of support from developed economies like Australia to lower income nations with shifting to clean energy, adapting to the impacts of climate change, and addressing loss and damage.
Such support is vital to building trust and cooperation, reducing global emissions, and supporting regional and global security by enabling countries to transition away from fossil fuels and build greater resilience.
Despite its central leadership role in this year’s global climate negotiations, our Government is yet to announce its contribution to international climate finance for 2025-2030. Greenpeace recommends a commitment of $11 billion for this five year period, which is aligned with the global goal under the Paris Agreement to triple international climate finance from current levels.
This new commitment should include additional funding to address loss and damage from climate change and a substantial contribution to the Pacific Resilience Facility, ensuring support is accessible to countries and communities that need it most. It should also see Australia get firmly behind the vision of a Fossil Fuel Free Pacific.
7. Protect nature

There is no safe planet without protection of the ecosystems and biodiversity that sustain us and regulate our climate.
Last year the Parliament passed important and long overdue reforms to our national environment laws to ensure better protection for our forests and other critical ecosystems. However, the Government will need to provide sufficient funding to ensure the effective implementation of these reforms.
Greenpeace has recommended $500 million over four years to establish the National Environment Agency — the body responsible for enforcing and monitoring the new laws — and a further $50 million to Environment Information Australia for providing critical information and tools.
Further resourcing will also be required to fulfil the crucial goal of fully protecting 30% of Australian land and seas by 2030. This should include $1 billion towards ending deforestation by enabling farmers and loggers to retool away from destructive practices, $2 billion a year for restoring degraded lands, $5 billion for purchasing and creating new protected areas, and $200 million for expanding domestic and international marine protected areas.
Conclusion
This is not the first time that conflict overseas has triggered an energy crisis, or that a budget has been preceded by a summer of extreme weather disasters, highlighting the urgent need to phase out fossil fuels. What’s different in 2026 is the availability of solutions. Renewable energy is now cheaper and more accessible than ever before. Global momentum is firmly behind the transition away from fossil fuels. The Albanese Government, with its overwhelming majority, has the chance to set our nation up for the future, or keep us stranded in the past. Let’s hope it makes some smart choices.
The 2026 budget test: Will Australia break free from fossil fuels?
Climate Change
What fossil fuels really cost us in a world at war
Anne Jellema is Executive Director of 350.org.
The war on Iran and Lebanon is a deeply unjust and devastating conflict, killing civilians at home, destroying lives, and at the same time sending shockwaves through the global economy. We, at 350.org, have calculated, drawing on price forecasts from the International Monetary Fund (IMF) and Goldman Sachs, just how much that volatility is costing us.
Even under the IMF’s baseline scenario – a de facto “best case” scenario with a near-term end to the war and related supply chain disruptions – oil and gas price spikes are projected to cost households and businesses globally more than $600 billion by the end of the year. Under the IMF’s “adverse scenario”, with prolonged conflict and sustained price pressures, we estimate those additional costs could exceed $1 trillion, even after accounting for reduced demand.
Which is why we urgently need a power shift. Governments are under growing pressure to respond to rising fuel and food costs and deepening energy poverty. And it’s becoming clearer to both voters and elected officials that fossil dependence is not only expensive and risky, but unnecessary.
People who can are voting with their wallets: sales of solar panels and electric vehicles are increasing sharply in many countries. But the working people who have nothing to spare, ironically, are the ones stuck with using oil and gas that is either exorbitantly expensive or simply impossible to get.
Drain on households and economies
In India, street food vendors can’t get cooking gas and in the Philippines, fishermen can’t afford to take their boats to sea. A quarter of British people say that rising energy tariffs will leave them completely unable to pay their bills. This is the moment for a global push to bring abundant and affordable clean energy to all.
In April, we released Out of Pocket, our new research report on how fossil fuels are draining households and economies. We were surprised by the scale of what we found. For decades, governments have reassured people that energy price spikes are unfortunate but unavoidable – the result of distant conflicts, market forces or geopolitical shocks beyond anyone’s control. But the numbers tell a different story.
What we are living through today is not an energy crisis. It is a fossil fuel crisis. In just the first 50 days of the Middle East conflict, soaring oil and gas prices have siphoned an estimated $158 billion–$166 billion from households and businesses worldwide. That is money extracted directly from people’s pockets and transferred, almost instantly, into fossil fuel company balance sheets. And this figure only captures the immediate impact of price spikes, not the permanent economic drain of fossil dependence. Fossil fuels don’t just cost us once, they cost us over and over again.
First, through our bills. Every time there is a war, an embargo or a supply disruption, fossil fuel prices surge. For ordinary people, this means higher costs for energy, transport and food. Many Global South countries have little or no fiscal space to buffer the shock; instead, workers and families pay the price.
Second, through our taxes. Governments around the world continue to pour vast sums of public money into fossil fuel subsidies. These are often justified as a way to protect the most vulnerable at the petrol pump or in their homes. But in reality, the benefits are overwhelmingly captured by wealthier households and corporations. The poorest 20% receive just a fraction of this support, while public finances are drained.
Third, through climate impacts. New research across more than 24,000 global locations gives a granular account of the true costs of extreme heat, sea level rise and falling agricultural yields. Using this data to update IMF modelling of the social cost of carbon, we found that fossil fuel impacts on health and livelihoods amount to over $9 trillion a year. This is the biggest subsidy of all, because these massive and mounting costs are not charged to Big Oil – they are paid for by governments and households, with the poorest shouldering the lion’s share.
Massive transfer of wealth to fossil fuel industry
Adding up direct subsidies, tax breaks and the unpaid bill for climate damages, the total transfer of wealth from the public to the fossil fuel industry amounts to $12 trillion even in a “normal” year without a global oil shock. That’s more than 50% higher than the IMF has previously estimated, and equivalent to a staggering $23 million a minute.
The fossil fuel industry has become extraordinarily adept at profiting from instability. When conflict drives up prices, companies do not lose, they gain. In the current crisis, oil producers and commodity traders are on track to secure tens of billions of dollars in additional windfall profits, even as households face rising bills and governments struggle to manage the fallout.
Fossil fuel crisis offers chance to speed up energy transition, ministers say
This growing disconnect is impossible to ignore. Investors are advised to buy into fossil fuel firms precisely because of their ability to generate profits in times of crisis. Meanwhile, ordinary people are told to tighten their belts.
In 2026, unlike during the oil shocks of the 1970s, clean energy is no longer a distant alternative. Now, even more than when gas prices spiked due to Russia’s invasion of Ukraine in 2022, renewables are often the cheapest option available. Solar and wind can be deployed quickly, at scale, and without the volatility that defines fossil fuel markets.
How to transition from dirty to clean energy
The solutions are clear. Governments must implement permanent windfall taxes on fossil fuel companies to ensure that extraordinary profits generated during crises are redirected to support households. These revenues can be used to reduce energy bills, invest in public services, and accelerate the rollout of clean energy.
Second, we must shift subsidies away from fossil fuels and towards renewable solutions, particularly those that can be deployed quickly and equitably, such as rooftop and community solar. This is not just about cutting emissions. It is about building a more stable, fair and resilient energy system.
Finally, we need binding plans to phase out fossil fuels altogether, replacing them with homegrown renewable energy that can shield economies from future shocks. Because what the current crisis has made clear is this: as long as we remain dependent on fossil fuels, we remain vulnerable – to conflict, to price volatility and to the escalating impacts of climate change.
The true price of fossil fuels is no longer hidden. It is visible in rising bills, strained public finances and communities pushed to the brink. And it is being paid, every day, by ordinary people around the world.
It’s time for the great power shift.
Full details on the methodology used for this report are available here.
The Great Power Shift is a new campaign by 350.org global campaign to pressure governments to bring down energy bills for good by ending fossil fuel dependence and investing in clean, affordable energy for all


The post What fossil fuels really cost us in a world at war appeared first on Climate Home News.
Climate Change
Traditional models still ‘outperform AI’ for extreme weather forecasts
Computer models that use artificial intelligence (AI) cannot forecast record-breaking weather as well as traditional climate models, according to a new study.
It is well established that AI climate models have surpassed traditional, physics-based climate models for some aspects of weather forecasting.
However, new research published in Science Advances finds that AI models still “underperform” in forecasting record-breaking extreme weather events.
The authors tested how well both AI and traditional weather models could simulate thousands of record-breaking hot, cold and windy events that were recorded in 2018 and 2020.
They find that AI models underestimate both the frequency and intensity of record-breaking events.
A study author tells Carbon Brief that the analysis is a “warning shot” against replacing traditional models with AI models for weather forecasting “too quickly”.
AI weather forecasts
Extreme weather events, such as floods, heatwaves and storms, drive hundreds of billions of dollars in damages every year through the destruction of cropland, impacts on infrastructure and the loss of human life.
Many governments have developed early warning systems to prepare the general public and mobilise disaster response teams for imminent extreme weather events. These systems have been shown to minimise damages and save lives.
For decades, scientists have used numerical weather prediction models to simulate the weather days, or weeks, in advance.
These models rely on a series of complex equations that reproduce processes in the atmosphere and ocean. The equations are rooted in fundamental laws of physics, based on decades of research by climate scientists. As a result, these models are referred to as “physics-based” models.
However, AI-based climate models are gaining popularity as an alternative for weather forecasting.
Instead of using physics, these models use a statistical approach. Scientists present AI models with a large batch of historical weather data, known as training data, which teaches the model to recognise patterns and make predictions.
To produce a new forecast, the AI model draws on this bank of knowledge and follows the patterns that it knows.
There are many advantages to AI weather forecasts. For example, they use less computing power than physics-based models, because they do not have to run thousands of mathematical equations.
Furthermore, many AI models have been found to perform better than traditional physics-based models at weather forecasts.
However, these models also have drawbacks.
Study author Prof Sebastian Engelke, a professor at the research institute for statistics and information science at the University of Geneva, tells Carbon Brief that AI models “depend strongly on the training data” and are “relatively constrained to the range of this dataset”.
In other words, AI models struggle to simulate brand new weather patterns, instead tending forecast events of a similar strength to those seen before. As a result, it is unclear whether AI models can simulate unprecedented, record-breaking extreme events that, by definition, have never been seen before.
Record-breaking extremes
Extreme weather events are becoming more intense and frequent as the climate warms. Record-shattering extremes – those that break existing records by large margins – are also becoming more regular.
For example, during a 2021 heatwave in north-western US and Canada, local temperature records were broken by up to 5C. According to one study, the heatwave would have been “impossible” without human-caused climate change.
The new study explores how accurately AI and physics-based models can forecast such record-breaking extremes.
First, the authors identified every heat, cold and wind event in 2018 and 2020 that broke a record previously set between 1979 and 2017. (They chose these years due to data availability.) The authors use ERA5 reanalysis data to identify these records.
This produced a large sample size of record-breaking events. For the year 2020, the authors identified around 160,000 heat, 33,000 cold and 53,000 wind records, spread across different seasons and world regions.
For their traditional, physics-based model, the authors selected the High RESolution forecast model from the Integrated Forecasting System of the European Centre for Medium-Range Weather Forecasts. This is “widely considered as the leading physics-based numerical weather prediction model”, according to the paper.
They also selected three “leading” AI weather models – the GraphCast model from Google Deepmind, Pangu-Weather developed by Huawei Cloud and the Fuxi model, developed by a team from Shanghai.
The authors then assessed how accurately each model could forecast the extremes observed in the year 2020.
Dr Zhongwei Zhang is the lead author on the study and a researcher at Karlsruhe Institute of Technology. He tells Carbon Brief that many AI weather forecast models were built for “general weather conditions”, as they use all historical weather data to train the models. Meanwhile, forecasting extremes is considered a “secondary task” by the models.
The authors explored a range of different “lead times” – in other words, how far into the future the model is forecasting. For example, a lead time of two days could mean the model uses the weather conditions at midnight on 1 January to simulate weather conditions at midnight on 3 January.
The plot below shows how accurately the models forecasted all extreme events (left) and heat extremes (right) under different lead times. This is measured using “root mean square error” – a metric of how accurate a model is, where a lower value indicates lower error and higher accuracy.
The chart on the left shows how two of the AI models (blue and green) performed better than the physics-based model (black) when forecasting all weather across the year 2020.
However, the chart on the right illustrates how the physics-based model (black) performed better than all three AI models (blue, red and green) when it came to forecasting heat extremes.

The authors note that the performance gap between AI and physics-based models is widest for lower lead times, indicating that AI models have greater difficulty making predictions in the near future.
They find similar results for cold and wind records.
In addition, the authors find that AI models generally “underpredict” temperature during heat records and “overpredict” during cold records.
The study finds that the larger the margin that the record is broken by, the less well the AI model predicts the intensity of the event.
‘Warning shot’
Study author Prof Erich Fischer is a climate scientist at ETH Zurich and a Carbon Brief contributing editor. He tells Carbon Brief that the result is “not unexpected”.
He adds that the analysis is a “warning shot” against replacing traditional models with AI models for weather forecasting “too quickly”.
The analysis, he continues, is a “warning shot” against replacing traditional models with AI models for weather forecasting “too quickly”.
AI models are likely to continue to improve, but scientists should “not yet” fully replace traditional forecasting models with AI ones, according to Fischer.
He explains that accurate forecasts are “most needed” in the runup to potential record-breaking extremes, because they are the trigger for early warning systems that help minimise damages caused by extreme weather.
Leonardo Olivetti is a PhD student at Uppsala University, who has published work on AI weather forecasting and was not involved in the study.
He tells Carbon Brief that “many other studies” have identified issues with using AI models for “extremes”, but this paper is novel for its specific focus on extremes.
Olivetti notes that AI models are already used alongside physics-based models at “some of the major weather forecasting centres around the world”. However, the study results suggest “caution against relying too heavily on these [AI] models”, he says.
Prof Martin Schultz, a professor in computational earth system science at the University of Cologne who was not involved in the study, tells Carbon Brief that the results of the analysis are “very interesting, but not too surprising”.
He adds that the study “justifies the continued use of classical numerical weather models in operational forecasts, in spite of their tremendous computational costs”.
Advances in forecasting
The field of AI weather forecasting is evolving rapidly.
Olivetti notes that the three AI models tested in the study are an “older generation” of AI models. In the last two years, newer “probabilistic” forecast models have emerged that “claim to better capture extremes”, he explains.
The three AI models used in the analysis are “deterministic”, meaning that they only simulate one possible future outcome.
In contrast, study author Engelke tells Carbon Brief that probabilistic models “create several possible future states of the weather” and are therefore more likely to capture record-breaking extremes.
Engelke says it is “important” to evaluate the newer generation of models for their ability to forecast weather extremes.
He adds that this paper has set out a “protocol” for testing the ability of AI models to predict unprecedented extreme events, which he hopes other researchers will go on to use.
The study says that another “promising direction” for future research is to develop models that combine aspects of traditional, physics-based weather forecasts with AI models.
Engelke says this approach would be “best of both worlds”, as it would combine the ability of physics-based models to simulate record-breaking weather with the computational efficiency of AI models.
Dr Kyle Hilburn, a research scientist at Colorado State University, notes that the study does not address extreme rainfall, which he says “presents challenges for both modelling and observing”. This, he says, is an “important” area for future research.
The post Traditional models still ‘outperform AI’ for extreme weather forecasts appeared first on Carbon Brief.
Traditional models still ‘outperform AI’ for extreme weather forecasts
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