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Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.

This week

Hurricane Melissa

‘TOTAL DEVASTATION’: Hurricane Melissa has killed at least 49 people after sweeping through the Caribbean islands of Jamaica, Cuba, Haiti and Bermuda, reported Independent. Jamaica’s prime minister Andrew Holness said the storm left “total devastation”, destroying homes and infrastructure and leaving people “stranded on roofs and without power”, said BBC News. In Haiti, at least 30 people were killed in floods, Reuters added.

WARM WATERS: Melissa is tied as the strongest Atlantic hurricane to ever hit land, slamming Jamaica with winds of 185mph and fuelled by anomalously warm waters, reported the Associated Press. Fossil-fuelled climate change made the storm “four times more likely”, according to analysis cited by Agence France-Presse. Early estimates suggest infrastructure damage alone could amount to 40% of Jamaica’s gross domestic product, said the newswire.

RECORD RAINS: Elsewhere, Al Jazeera reported on major floods in central Vietnam, where the former imperial city of Huế saw record rainfall of more than 1,000mm over a 24-hour period, according to the country’s weather agency. The Associated Press reported that climate change is “driving more intense winds, heavier rainfall and shifting precipitation patterns across East Asia”.

Climate plans off track for 1.5C

‘DRASTICALLY SHORT’: The latest national climate plans will cause global emissions to drop 10% by 2035 from 2019 levels, “bending the emissions curve downwards for the first time”, but falling “drastically short” of the 60% cut needed to keep 1.5C in sight, said the Guardian. The plans – known as nationally determined contributions (NDCs) under the Paris Agreement – were assessed by the UN in a synthesis report ahead of COP30, the publication said. The 10% cut reflects plans announced by China and the EU, in addition to formal submissions from 64 countries, according to Reuters.

OVERSHOOT ‘INEVITABLE’: UN secretary-general António Guterres said in a joint interview with the Guardian and the Amazonian publication Sumaúma that overshooting 1.5C of global warming was now “inevitable” and would have “devastating consequences”. Guterres “did not give up on the [1.5C] target”, but urged world leaders to “change course” during COP30 to ensure the “overshoot is as short as possible and as low in intensity as possible to avoid tipping points like the Amazon”.

Around the world

  • DELIVERY: The UK government published its “carbon budget and growth delivery” plan, outlining policies to meet its mid-2030s climate targets. Read more in Carbon Brief’s in-depth coverage of the plan.
  • DEAL UNEARTHED: Donald Trump and Xi Jinping have settled a dispute over rare-earth mineral supplies during trade talks, said the Guardian. Trump described the talks as “amazing” and agreed to reduce tariffs on Chinese goods by 10%, it added.
  • AVOIDABLE DEATHS: Climate change and policy “failures” are leading to “millions” of avoidable deaths each year, according to Le Monde’s coverage of the latest Lancet Countdown report on health and climate change.
  • DEFORESTATION DOWN: On the eve of hosting COP30, Brazil’s government announced an 11% drop in annual deforestation in the Brazilian Amazon, the fourth consecutive annual fall and lowest deforestation rate since 2014, reported Agence France-Presse.
  • DUTCH ELECTION: Democrats 66 (D66), the centrist party led by former climate minister Rob Jetten, narrowly won a snap general election in the Netherlands, said Brussels Signal
  • EU FLEXIBILITY: As the EU continues to negotiate 2040 emissions targets, the bloc is considering a “more flexible path” for industries to meet the goals, reported Reuters.

12 times

The extent to which current finance flows would have to increase to meet developing countries’ adaptation finance needs in 2035, according to the latest UN adaptation gap report covered by Carbon Brief.


Latest climate research

  • Young children in sub-Saharan Africa are 77% more at risk from malaria for every 1C temperature increase |  PLOS One
  • Social media use is linked to “climate anxiety, climate doom and support for radical action” | Climatic Change
  • Future droughts could weaken peatlands’ ability to store carbon, creating a positive feedback cycle for climate change | Science

(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)

Captured

Soil horizons are divided into organic matter, topsoil, subsoil, substratum or parent material and hard bedrock.

Carbon Brief explored the importance of soil health for food security and climate change in a new Q&A. As the diagram above illustrates, agricultural soil is composed of four layers – known as soil horizons – containing varying quantities of minerals, organic matter, living organisms, air and water. The world’s soils have lost 133bn tonnes of carbon since the advent of agriculture around 12,000 years ago, with crop production and cattle grazing responsible in equal part.

Spotlight

Crackdowns on climate and environmental activism

This week, Carbon Brief speaks to Mary Lawlor, UN special rapporteur on human rights defenders, who led a recent report highlighting crackdowns on the rights of climate and environmental activists around the world.

Carbon Brief: Why do you see climate change as a human-rights issue?

Mary Lawlor: I don’t think there’s any doubt about climate change being a human-rights issue nowadays, because everyone can see it. It interferes with so many rights. The right to food, for example. We’ve seen the situation where drought, storms and floods interfere with food production. And then if you look at the right to life – according to the WHO, we’re currently seeing an average of 175,000 heat-related deaths per year around the world, and those numbers will increase. But we now also have advisory opinions of the ICJ, the Inter-American Court of Human Rights, the International Tribunal for the Law of the Sea, all of which state clearly that climate change is a reality. They see it as a human-rights crisis.

CB: What human-rights violations are being faced by climate and environmental activists around the world right now?

ML: We went to a lot of Indigenous communities in the Amazon and we saw firsthand the threats against Indigenous defenders in Brazil who are opposing carbon-credit projects in their territories, where they themselves have been reducing deforestation with success for years. Then, for example, there were smears against a lawyer in Argentina who was supporting communities in their legal fight against the extraction of lithium from their territories without their consent. And, then, you have surveillance of climate activists organising peaceful protests against new fossil-fuel projects, for example, in the Philippines. So it’s kind of like an octopus, the tentacles are reaching out.

An Indigenous woman protests outside pre-COP30 meetings in Brasilia, Brazil.
An Indigenous woman protests outside pre-COP30 meetings in Brasilia, Brazil. Credit: Associated Press / Alamy Stock Photo

In some of the more developed countries, like France and Spain, you have accusations of terrorism against peaceful climate-justice movements. In Germany, you had the investigation and prosecution of a climate-justice group for alleged organised crime based solely on their peaceful protests that put no human being in danger and did no harm to anyone.

CB: What are some examples that you’ve seen of good practice by governments in relation to the work of climate and environmental activists?

ML: My favourite is Brazil and MST [Landless Workers’ Movement]. They were aided in their tree-planting programme by the federal authorities, who provided helicopters and the federal highway police piloted these helicopters. Seeds of the endangered juçara palm and araucaria trees could be air-dropped over land in Paraná, after the devastating fires that took place. So that’s my absolute favourite, because it showed how a state and defenders can work together as allies to prevent destruction and even worse climate change.

CB: According to Global Witness, 413 land and environmental defenders were killed in Brazil during 2012-2024. What is the current situation for environmental defenders in Brazil going into COP30?

[Brazil] are really making efforts, as far as I can see, to address the root causes – and this is really why human-rights defenders are in such danger – that is, land is at the heart of all the problems there. But progress is still very slow. At the moment, only 16 territories have been demarcated by [Brazilian president] Lula and that is hugely important because, as I said, it’s at the root of pretty much all the attacks and killings by either the thugs associated with the companies, or the big landowners, the illegal logging, and all the stuff that is happening there. So that is something that we really need a speed up of – the demarcation of Indigenous lands.

When it comes to COP30, they’ve put some effort into making it more inclusive, especially when it comes to bringing the voices and experiences of Indigenous defenders into the negotiations. Now we’ll see what will happen in November and what the negotiations bring.

This interview has been edited for length.

Watch, read, listen

‘GOD’S WILL’: Samaa TV followed four street workers across Pakistan, exploring their views on climate change through the lens of faith.

COP EXPECTATIONS: Down to Earth unpacked what to expect from COP30 from a global-south perspective in their Carbon Politics podcast.

1.5C ALIGNED: Scientist and former UN climate lead Ploy Achakulwisut grappled via a LinkedIn post with the challenges of assessing whether national targets are aligned with a 1.5C world.

Coming up

Pick of the jobs

DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.

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The post DeBriefed 31 October 2025: Hurricane Melissa strikes Jamaica; Climate plans overshoot 1.5C; Protest crackdowns appeared first on Carbon Brief.

DeBriefed 31 October 2025: Hurricane Melissa strikes Jamaica; Climate plans overshoot 1.5C; Protest crackdowns

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Introducing Project Cosmos: Carbon Brief’s ‘universe’ of climate science

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Carbon Brief’s Project Cosmos is a major collaborative effort to build the world’s largest and most complete database of climate change research.

The Cosmos database – which features more than 1.8m individual publications linked by 40m citation relationships – captures the vast body of human knowledge about climate change that has accumulated over more than a century of academic study.

Cosmos is a major new resource, which has taken more than 18 months to research and build, with help and guidance from a specialist team of academics.

Carbon Brief embarked on Project Cosmos to map and analyse the scientific community’s foundational knowledge about climate change.

This includes, at first, ranking the most highly cited academic publications, authors and institutions.

Together, this series of rankings is known as the Cosmos 500.

But, over time, the database will reveal, for example, how interest in different areas of climate science has changed over time, plus identify potential knowledge gaps and, thus, opportunities for future research.

The post Introducing Project Cosmos: Carbon Brief’s ‘universe’ of climate science appeared first on Carbon Brief.

https://www.carbonbrief.org/introducing-project-cosmos-carbon-briefs-universe-of-climate-science/

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Two to tango: How governments can unlock private investment for national climate goals

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Even the most ambitious national climate plans aimed at cutting emissions to meet the 1.5C global warming goal in the Paris Agreement often lack a vital ingredient for success: private investment.

With governments facing fiscal and political pressures, attracting private capital will be crucial for accelerating climate action in the coming years.

Yet many Nationally Determined Contributions (NDCs) still do not have the sector-specific plans, economic incentives, policy certainty, infrastructure investment and ongoing dialogue needed to break silos between the public and private sectors and bring more businesses on board.

“If you just have the high-level (NDC) target from the government in a vacuum, it’s not going to spur much business action,” said Greg Briner, senior manager for policy at the We Mean Business Coalition, which works with companies pushing for stronger climate action.

“But that target combined with … more specific policies and measures that get put in place as a result of that target-implementing process, or as a result of the NDCs, is where the magic starts happening,” he explained.

NDCs: late and inadequate

NDCs are voluntary climate action plans created by countries under the Paris Agreement. They include commitments such as expanding renewable energy, reducing fossil fuels, halting deforestation and other measures to cut greenhouse gas emissions and limit global warming.

First submitted in 2015 for the Paris Agreement, NDCs should be updated with more ambitious targets every five years, although some governments have not stuck to this timetable.

Last year, most countries missed an initial February deadline to finalise the latest round of plans, known as “NDCs 3.0” – and at least 50 countries, mainly developing nations, have still not done so.

Paris Agreement committee snubbed over missing NDC climate plans

Although these national plans have helped drive emissions reductions in some sectors – including falling deforestation rates and greater investments in renewables – climate experts say progress remains far too slow to meet the Paris goals and urgent action is now needed.

Last November, the UN climate body projected that global emissions would fall by around 12% from 2019 levels by 2035, based on a preliminary assessment of new NDCs announced by countries that produce nearly 70% of the world’s greenhouse gases.

The Intergovernmental Panel on Climate Change has said countries should cut emissions far more rapidly, with a 60% drop by 2035 needed to limit global warming to 1.5C.

But for developing economies especially, the multi-billion-dollar costs associated with transitioning to greener energy systems and curbing their emissions are still a major barrier. Climate experts say governments and businesses need to move in step if NDC targets are to be achieved.

“There are positive actions going on but we need a significant ramping up. It’s not happening quickly enough,” said Briner. “It’s (about) building on these foundations that are being put in place.”

Nurturing the conditions for private investment

Last September, consumer goods giant Unilever published a report, entitled Bold Plans, Real Impact, examining how corporate climate transition plans and NDCs can support each other.

Among its recommendations, the report called for governments to provide clearer roadmaps for private-sector engagement. It also highlighted the need for stronger regulatory frameworks, market incentives, sector-specific transition pathways and integrated, economy-wide planning.

For businesses, the report recommended aligning their transition plans with national climate priorities, collaborating more closely with industry peers, strengthening monitoring and verification systems, and unlocking finance through public-private partnerships.

Comment: The missing piece in COP climate talks – market signals for adaptation

A year earlier, the We Mean Business Coalition published a similar report, Time to Deliver: Business Call to Action for Ambitious and Investible NDCs.

This report urged governments – particularly in the G20 economies – to unlock private investment through sectoral targets, clean energy expansion, energy efficiency measures, fossil fuel phase-outs and commitments to halt deforestation.

It also stressed the importance of translating climate targets into concrete policies, backed by national implementation strategies and coordination across ministries.

Another key recommendation was the need for more transparent and inclusive dialogue with businesses throughout the NDC process. Early consultation with companies, the report said, should be embedded into the development and implementation of NDCs to ensure that climate plans reflect commercial realities.

Briner of We Mean Business said the economics of decarbonisation have changed dramatically over the past two decades.

“Ten to 20 years ago, decarbonising and investing in clean energy and electrification was seen as nice-to-have and a more expensive option, but these days, it simply makes business sense,” he said, referring to recent geopolitical events in the Middle East that have roiled oil and gas markets, pushing up fossil fuel prices.

However, upfront costs for clean energy infrastructure remain a major hurdle. Governments therefore need to complement climate policies with investments, concessional loans, grants, subsidies and tax incentives to help reduce risks, Briner added.

“Globally, there are still significant subsidies going to fossil fuels in different forms,” he said. “If we could redirect some of those current incentives away from fossil fuels and into clean electrification and clean energy, then that would certainly help.”

    Brazil’s sector-specific climate planning

    Brazil’s NDC targets include expanding renewable energy – which already accounts for nearly 45% of its energy mix – ending illegal deforestation and reaching net-zero emissions by 2050.

    According to Briner, Brazil’s climate strategy – known as Plano Clima – offers an example of how governments can provide businesses with clearer implementation guidance.

    Years in development, the initiative sets out how Brazil intends to meet its climate goals through a series of sectoral plans covering areas such as energy, transport and land use.

    “They’ve put together some pretty detailed, impressive plans,” Briner said. “Those are the types of things that will influence business models and business decisions. It’s this more detailed second layer of setting out national plans which is of interest to business.”

    A solar farm near the Brazilian city of Curitiba (Photo: C40 Cities)

    A solar farm near the Brazilian city of Curitiba (Photo: C40 Cities)

    Last year, a transport coalition of more than 50 associations, companies and academia put forward a plan to help reduce the sector’s emissions and attract more than $600 billion in green investments in Brazil.

    The previous year, 55 companies operating in Brazil, including Natura, Nestle, Itau and Unilever, called for more ambitious NDCs and clearer implementation policies, as well as encouraging climate-friendly investment and private-sector involvement.

    Unilever, for example, has a global goal to create a deforestation-free supply chain and is partnering with a leading supplier in Brazil to ensure that soybean oil used at its factory there is not linked to forest loss.

    Cheaper capital, high-quality projects

    Although Brazil has relatively sophisticated capital markets, high interest rates still make long-term, low-carbon investments difficult, said Natalie Unterstell, president of the Talanoa Institute, a Brazilian environmental think-tank.

    To address this challenge, Brazil is scaling up Fundo Clima – its National Climate Change Fund – as a central part of its implementation strategy by offering cheaper financing at scale.

    But Unterstell said the private sector also needs to demonstrate that it can develop and deliver high-quality, low-carbon projects.

    “Making Brazil’s policies investable is about making sure cheaper capital meets a pipeline of real, high-quality projects,” she said by email.

    Brazilian firm behind SAF plan found growing oil palm on deforested Amazon land

    While many companies have announced climate commitments, investment decisions have not always followed, she added.

    “What companies can do better is move from targets to investment: adopt robust transition plans, and integrate carbon risk into core financial decisions,” Unterstell said.

    On the government side, the priority is to “fix the signals”, she added. That means ensuring Brazil’s regulated carbon market – which is due to start in 2027 for sectors including iron and steel, cement, and oil and gas – operates with clear rules, credible enforcement and no delays, while aligning public finance with climate goals and providing long-term policy certainty.

    “At the moment, both sides are waiting for stronger signals from the other, hence breaking that co-ordination problem is key,” she said.

    Indonesia’s challenge: bridging the finance gap

    Like Brazil, Indonesia is home to large areas of rainforest, but its energy mix relies far more heavily on fossil fuels, with coal providing about a third of supply. In its NDCs, Indonesia has pledged to reduce emissions by 31.9% by 2030 compared with business-as-usual levels, or by 43.2% with international support, on the way to reaching net zero by 2060.

    Yet despite being promised more than $20 billion in international financial support from donor governments and investors under its Just Energy Transition Partnership, Jakarta has decided to row back on a plan to close a key coal power station early, saying it will focus on shuttering older and dirtier plants first.

    To attract private investment to help achieve its emissions goals, Indonesia must provide policy clarity and long-term certainty, said Fabby Tumiwa, executive director of the Institute for Essential Services Reform, an Indonesian think-tank.

    Comment: Indonesia’s failing Just Energy Transition Partnership is a cautionary tale

    “Any investor wants to understand the long-term risks of the country so that they can assess the risks properly and come up with a risk mitigation strategy. Uncertain policies basically make investors unable to mitigate the risks,” Tumiwa told Climate Home News.

    “To make Indonesia’s climate policies investable for the private sector, the core task is to convert climate ambition into bankable, enforceable, risk-adjusted projects,” he said. “Investors do not only need targets; they need predictable revenue, credible off-takers, permits, grid access, currency-risk management and policy durability.”

    Indonesia has estimated the investment needed to meet its NDC goals at more than $400 billion but has yet to clearly outline how businesses can directly contribute, said Egi Suarga, senior manager for climate at World Resources Institute Indonesia, a research organisation.

    He said climate action should be framed as an investment opportunity rather than an economic burden.

    Evolving policies and regulations

    Over 100 Indonesian companies have adopted net-zero and are ready to ramp up decarbonisation given clear national guidance, according to the We Mean Business Coalition.

    Indonesia’s Indika Energy is making heavy investments in renewable energy such as solar, while cement company Solusi Bangun Indonesia is also investing in cleaner energy, fuel efficiency and pushing better biodiversity management.

    Meanwhile, Unilever’s climate transition plan states that the company is working with local government and environmental NGOs in Indonesia to protect and restore forests in Aceh and North Sumatra. It is also switching from natural gas to biomethane at its Indonesian sites.

    An Indonesian ranger patrols a forest protected through a carbon credit project. Photo: Dita Alangkara/CIFOR

    An Indonesian ranger patrols a forest protected through a carbon credit project. Photo: Dita Alangkara/CIFOR

    One positive development, Suarga noted, is the creation of carbon pricing regulations aimed at attracting private finance, with an initial focus on the forestry sector.

    “It can create a good climate for investors,” he said. “It doesn’t directly mention that this is for achieving the NDCs but there is no trade-off between development financing with environmental protections – so that’s a good start.”

    Indonesia also needs stronger incentives and regulations for renewable energy, he added.

    “We also have to think about other sectors now – like the energy sector and renewables,” Suarga said. “How can the government provide more incentives or facilitating regulations that can be more profitable to create a level playing field for renewables and fossil fuels?”

    Ambition loop to drive action

    Like Tumiwa, Suarga stressed the need for greater dialogue between the government and businesses so companies can understand better how they can contribute to Indonesia’s emissions targets.

    “They know about sustainability because of the market and demands of the market… [but] I’m not sure whether [they] really understand about Indonesia’s target to achieve a certain amount of emissions reductions in the NDCs,” he said.

    Currently, the government and private sector are largely working separately, Suarga added. The challenge lies in bringing them together to set targets, plan implementation and monitor emissions reductions. “It will need two to tango. The government should engage more with the private sector,” he emphasised.

    Big banks’ lending to coal backers undermines Indonesia’s green plans

    For the We Mean Business Coalition’s Briner, what is ultimately needed is an “ambition loop” in which businesses lead on emissions reductions while governments create policies that accelerate private-sector action.

    “It really helps governments when they have a strong voice from business calling for policy action. It helps move things forward,” he said.

    Without stronger policies and incentives, achieving NDC goals will become increasingly difficult to achieve and costly, experts say.

    “It’s really a case of all hands-on deck right now,” Briner said. “We need all sides of this equation working together and trying to get this done because there isn’t an alternative.”

    The post Two to tango: How governments can unlock private investment for national climate goals appeared first on Climate Home News.

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    How a Tiny Texas River Agency Plans to Build the Largest Desalination Plant in the Country

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    Officials from the Nueces River Authority collected millions of dollars from cities and utility districts near San Antonio and Austin before they partnered with an Israeli desalination giant.

    This story was produced in partnership with the Texas Newsroom, the state’s network of public radio stations.

    How a Tiny Texas River Agency Plans to Build the Largest Desalination Plant in the Country

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