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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

G7 sets end date for coal

CUTTING COAL: The US, UK, Germany and other Group of Seven (G7) countries committed to phase out coal power by 2035, the Associated Press reported, noting that it “puts a timeline” on global pledges to “phase down” coal. G7 countries agreed two years ago to decarbonise their power sectors by 2035 and Climate Home News noted that most nations in the group already have coal phase-out plans.

LEEWAY: However, the G7 pact also included an “alternative goal” to phase out coal power “in a timeline consistent with keeping a limit of a 1.5C temperature rise within reach”, Reuters said. Sources told the outlet that this would “grant room for manoeuvre to Germany and Japan”, two coal-reliant countries. The Financial Times said the deal also leaves open the possibility of “continued investment in gas”.

FUELLING THE FIRE: A study found that global banks lent $470bn (£374bn) to coal industry companies between January 2021 and December 2023, Der Spiegel reported. Meanwhile, in the UK, the government is expected to permit fossil fuel companies to explore for oil and gas under offshore wind sites for the first time, the Guardian reported, with experts saying this will likely do little to increase production.

Deadly floods hit globe

COUNTRYWIDE IMPACT: Heavy rainfall and flooding have hit many parts of Kenya in recent weeks, killing more than 180 people, Reuters reported. At least 48 people were killed after a dam burst its banks near a town in the south of the country, according to the Standard newspaper. A river also overflowed into the famous Masai Mara wildlife reserve and flooded tourist camps, the New York Times said.

CLIMATE LINK: Context News reported that scientists blame a “deadly cocktail” of climate change and the El Niño weather pattern for floods in Kenya and other neighbouring countries. In the Conversation, a hydrology consultant said that the floods also “expose decades of poor urban planning and bad land management”.

HIGHWAY HIT: Meanwhile, heavy rainfall persisted in China’s Guangdong province. At least 24 people died after a highway collapsed due to the “torrential rain”, the Independent said. There is no formal “attribution” study on whether global warming worsened the Guangdong floods, but one rapid analysis found that the “somewhat uncommon event” was “exacerbated” by both human-caused climate change and natural variability.

BURST DAM: In Brazil, more than 30 people following heavy rains and flooding and a hydroelectric dam burst, BBC News reported. The “extreme weather” across the southern state of Rio Grande do Sul was caused by a “rare combination of hotter than average temperatures, high humidity and strong winds”, the outlet said. 

Around the world

  • CARBON BUDGETS: For the second time in two years, the High Court in London has ruled that the UK’s climate action plan is unlawful, Reuters reported, in a legal challenge put forward by environmental groups.
  • UP, UP AND AWAY: Airlines lobbied the EU to “weaken” its plans to make the sector monitor and report non-CO2 greenhouse gas emissions from flights, according to the Financial Times.
  • SNP SWITCH: Humza Yousaf resigned as Scotland’s first minister days after he ended a power-sharing deal with the country’s Green party, the Scotsman reported. Yousaf “cut ties” with the Greens after a “bitter row” over his party’s recent decision to abandon 2030 climate targets, Sky News said.
  • PLASTIC PITCH: Rwanda and Peru put forward a proposal to reduce global plastic production by 40% by 2040 at UN treaty talks, the Guardian reported. The target should “align” with aims under the Paris Agreement to limit global warming to 1.5C, the two countries said.
  • BIG OIL: Large oil companies “misled Americans for decades” on climate change and knew the “consequences of their emissions” for at least 60 years, according to a new Democrat report and Congressional hearing covered by NBC News.

195

The number of countries expected to submit new biodiversity pledges ahead of the UN summit COP16 in October.

7

Countries that have done so, Carbon Brief analysis showed.


Latest climate research

  • Methane emissions from China’s abandoned coal mines have been underestimated, Nature Climate Change research found.
  • Plans to draw down CO2 from the atmosphere “fall short” of the measures needed to limit global warming to 1.5C above pre-industrial temperatures, new research covered by Carbon Brief warned.
  • A study in Nature Geoscience said that losing tropical forest has a greater effect on increasing land surface temperatures than gaining forest does on cooling them.

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

Captured

British electricity supplies are shifting away from fossil fuels

Recent Carbon Brief analysis showed that fossil fuels supplied a record-low 2.4% of electricity in Britain, for one hour on Monday 15 April. This new chart paints a more complete picture of how British electricity supplies are shifting decisively away from fossil fuels. The figure shows the distribution of half-hours in each year since 2009, arranged according to the share of fossil fuels during each time period. Periods when the grid was more than 50% reliant on fossil fuels are shaded red and, reading from top to bottom, these have become increasingly rare over the past 15 years. Periods with less than 50% fossil fuel, shaded blue, are becoming more common.

Spotlight

Brazil’s pitch to tax the ultra-rich

This week, Carbon Brief speaks to a policy expert about how Brazil’s plan to tax billionaires could help to address climate change.

Quentin Parrinello, a senior policy advisor at EU Tax Observatory.

Earlier this year, Brazil proposed a global tax on the ultra-wealthy, an idea recently supported by other Group of 20 (G20) countries.

The funds could be used to tackle inequality and climate change, ministers from Brazil, South Africa, Germany and Spain wrote in the Guardian last week.

The tax would raise up to $250bn (£200bn) each year from around 2,700 billionaires, according to a report from the EU Tax Observatory.

Quentin Parrinello, a senior policy advisor at the think-tank, tells Carbon Brief about the proposal and how it could help to tackle climate change. This interview was edited for length.

Carbon Brief: Can you explain how a 2% billionaire wealth tax would work?

Quentin Parrinello: We’re looking at all of the taxes paid by the super-rich, adding all of them and, if they do not add up to a minimum amount [of] 2% of their wealth, then there’s a top-up tax to reach that 2%…Back in February, there was a meeting of finance ministers from the G20 in São Paulo. Gabriel Zucman [director of the EU Tax Observatory] was invited to present that idea of a minimum tax on the super-rich…There was a wide recognition in response that tax progressivity is indeed a topic that needs to be tackled and also a lot of demands for technical details, which is why the Brazil [G20] presidency commissioned us to do a report that is due to look at the feasibility of the technical implications of that tax.

CB: With climate change already intensifying each year, should these discussions have been pursued decades ago?

QP: Billionaires derive their wealth from global assets that have access to global markets and that emit carbon all over the globe. So they have a very clear responsibility in heightening climate change and carbon emissions…I think that, sadly, the conversation might be slightly easier now than it was 10 or 15 years ago because we’re seeing in many more countries today the effect of climate change. It’s not rhetoric about potential future impacts, we’re seeing the impact now. We’re seeing an increasing number of floodings and heatwaves everywhere.

CB: The proposal is due to be discussed at the G20 summit in July. What are the next steps?

QP: We’re releasing our report with all the technical details around June. Our understanding is that the [Brazilian G20] presidency wants to use that report to convince a large number of countries to endorse the need for a discussion to happen around the summer. As more countries endorse it, perhaps we’ll have enough countries to start an international negotiation. Those things, unfortunately, take time. So we’re not looking at something that will deliver a tax up and running in six months. That might take a few months more, perhaps a few years more. I think what we need to have is clear commitment from G20 presidencies, from an increasing number of countries to actually talk about this to go towards a negotiation framework that enables us to deliver on that tax.

Watch, read, listen

CLIMATE SOLUTIONS: Data scientist Hannah Ritchie spoke to the New York Times podcast the Ezra Klein Show about the feasibility of “sustainability without sacrifice”.

WOODLAND WOES: The Financial Times looked at how deforestation can be a “driving factor” in diseases spreading from animals to humans.

GREEN PUSHBACK: The Guardian examined how climate policies have become a “focal point for far-right attacks” in Germany in a short video documentary.

Coming up

Pick of the jobs

DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.

The post DeBriefed 3 May 2024: G7 sets end date for coal; Deadly floods around globe; Brazil’s pitch to tax ultra-rich appeared first on Carbon Brief.

DeBriefed 3 May 2024: G7 sets end date for coal; Deadly floods around globe; Brazil’s pitch to tax ultra-rich

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Climate Change

Marine Parks Explained

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Australia’s network of marine parks is the largest in the world, covering more than half (52%) of Australia’s Commonwealth waters. You could be forgiven for assuming that a marine park is much like a national park on land: a highly protected place where people can enjoy nature while conservation efforts help habitats recover and wildlife thrive. You wouldn’t expect someone to bulldoze a national park, so why should they be allowed to bottom trawl in a marine park?

The reality is that not all marine parks are equally protected. Australia’s Marine Parks Network is divided into different zoning categories, with each zone determining which activities are permitted and the level of protection provided.

More than half of the Commonwealth Marine Parks Network allows industrial activities like oil and gas mining, and industrial fishing.

Our survival, and the survival of our planet, depends on the ocean. The ocean produces more oxygen than all of our forests combined, sustains communities and regulates the earth’s temperature. It’s home to wondrous wildlife and important ecosystems like coral reefs and kelp forests.

We love our big blue backyard

Australia’s ocean is teeming with life that is found nowhere else on earth. Schools of colourful fish, vibrant coral reefs, endemic shark nurseries, pods of dolphins, families of whales, playful seal pups and threatened Jurassic-era turtles call Australian waters home.

Since time began, from the turquoise waves to the deep blue, the ocean has connected our shorelines and communities, fed us, guided us and grounded us. We are intrinsically connected to our big blue backyard – more than 85% of us live within 50km of the shoreline. For tens of thousands of years, people have lived in harmony with the ocean and the wildlife within it, caring for and being sustained by its rich waters. Australia’s waters are some of the most unique and abundant places on Earth but our Marine Parks Network is falling short to properly protect them. 

Australia’s marine parks aren’t living up to their name

© Greenpeace / Harriet Spark

The Australian Commonwealth Marine Parks Network covers commonwealth waters 5.5km from the coast. The network is divided into 7 regional management areas, overall the network contains 60 marine parks. Zoning types determine what activities are allowed in each area. Over half of the network allows industrial activities, risking our most precious and threatened ocean wildlife.

Within many of our marine parks, destructive industries are allowed to fish, trawl, dig and mine using barbaric and cruel methods. Here are some of the zones explained:

  • Bottom Trawling: Special Purpose (trawl) zones allow bottom trawling. This covers 10 marine parks totalling almost 13 million hectares. Bottom trawlers bulldoze the seafloor with weighted nets, deforesting our underwater forests; a cruel, indiscriminate and inefficient way to fish.
  • Other Industrial Fishing: Includes “Habitat Protection Zones, ““Multi Use Zones” and “Special Purpose Zones.” Fishing methods vary from park to park but many marine parks in these zones allow industrial fishing like longlining. Longlining involves setting lines that can be 100km long, bristling with deadly hooks designed to catch a specific fish species. But longlining is not a selective method of fishing – significant numbers of sharks, rays, turtles, dolphins and seabirds can be harmed or killed as bycatch in the process.
  • Oil and Gas Mining: Many “Special Purpose” and “Multi Use” zones allow seismic blasting and oil and gas mining. 30 marine parks or 65 million hectares of Australia’s highest conservation value areas for ocean wildlife are open for mining and exploration of oil and gas.
  • Ocean Sanctuaries: National Park and Sanctuary zones are fully and highly protected marine parks designed to conserve wildlife and their habitat, where fishing, mining, and other industrial activities are not allowed.

Industrial fishing is one of the biggest threats to the ocean

Marine parks on the east coast that allow bottom trawling. 10 marine parks across the whole network allow bottom trawling totalling almost 13 million hectares of ocean habitat for precious wildlife.

In May, Greenpeace Australia Pacific sailed our campaigning vessel Oceania through some of Australia’s most beautiful and threatened marine parks. Our crew visited Jervis and Hunter marine parks to document their beauty, showcase what’s at risk and aim to expose the industrial fishing activities in these protected waters. Both of these marine parks allow bottom trawling and longlining methods of industrial fishing.

Industrial fishing is ripping the ocean apart across the planet. Longlining, also known as longline fishing, is an industrial fishing method that involves the use of a fishing line with thousands of baited hooks. These fishing lines can stretch over 100 kilometers in length and are set to capture a fish species, often tuna or billfish species. But it is not a selective method of fishing  and often results in significant bycatch. This includes a range of non-target species like sharks, rays, sea turtles, marine mammals, and seabirds which are often injured or killed as bycatch.

Bottom trawling involves dragging heavy weighted nets along the ocean floor. This fishing method is popular with commercial fishing companies, because it makes it easy to catch large quantities of fish in one go. But it also damages the seafloor, releasing carbon and can kill or injure non-target ocean life like coral, fur seals, dolphins and seabirds. You may have watched the reality of bottom trawling (and the benefits of ocean sanctuaries) in Ocean with David Attenborough, if not, add it to your watch list!  

Fully protected ocean sanctuaries that ban industrial fishing and mining can protect ocean wildlife and underwater wonderlands for generations to come. Vast, robust sanctuaries create blue havens where ocean wildlife are safe from nets and hooks, and can truly rest, recover, thrive and replenish out into the surrounding waters. Ocean sanctuaries ensure a healthy ocean full of life.

A once-in-a-decade chance to fix what’s falling short

We have a unique opportunity to turn the tide.

The Australian Government is asking for your feedback on how our Commonwealth Marine Parks Network is managed. This is our once-in-a-decade chance to protect ocean wildlife, ban industrial fishing and create more ocean sanctuaries.

As part of the review the Government is asking for submissions from the public to hear from you on what improvements are needed to better protect our vast network of marine parks. Writing a submission is a powerful way to influence government decisions and create real change.

This is the moment to ban industrial activities like bottom trawling and oil and gas mining. But only if they hear from YOU. Add your name!

Greenpeace is calling on the Australian government to:

1. Ban industrial activities from Australia’s Marine Parks Network: Ban industrial activities, such as industrial fishing, seismic blasting and oil and gas mining, from Australia’s marine parks.

2. Create more ocean sanctuaries: Increase fully protected sanctuaries in Australia’s marine parks based on science principles.

3. Connect Australia’s Marine Parks Network to the High Seas: mCreate seascape connectivity by linking Australian marine parks to new high seas ocean sanctuaries.

References

Substantiation that more than half of the Marine Parks Network permits industrial activity comes from a peer-reviewed systematic literature review (Phillips et al. 2025, PLOS One, https://doi.org/10.1371/journal.pone.0307324). The study found that within the Commonwealth Marine Parks Network specifically, “all zones are considered partially protected areas, meaning areas where extractive activities are permitted, except ‘Pink zones’ (Preservation Zones; IUCN Ia) and ‘Green Zones’ (IUCN II).” In other words, every Commonwealth marine park zone type other than the network’s strict no-take sanctuary and national park zones (IUCN Ia and II) permits some form of extractive industrial activity. Since no-take zones are the minority zone type across the network by area, this supports the conclusion that the majority of the network’s area is zoned to permit industrial activity.

DCCEEW Australian Marine Parks spatial dataset (https://fed.dcceew.gov.au/datasets/erin::australian-marine-parks/explore), filtered by zone type. This confirms that 38.43% of the network’s area is zoned as Sanctuary or National Park zones (IUCN Ia and II). These are the no-take categories excluded from the peer-reviewed study’s definition of partially protected/industrial-permitting zones. The remaining 61.57% of the network falls within the zone categories the study classifies as permitting industrial activity (per The MPA Guide definition of “industrial” applied in Phillips et al. 2025), directly corroborating the peer-reviewed finding with current Commonwealth-specific spatial data.

For further information on activities permitted within the Marine Parks Network Zoning, you can refer to the Management Plans zoning and rules for each Marine Parks Network area, for example: Temperate East, Coral Sea, North.

Marine Parks Explained

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Climate Change

Report: Trawling the Bottom Line

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A new report from Greenpeace Australia Pacific advocates for the closure of bottom trawling in Australia’s Commonwealth Marine Parks Network. Bottom trawling continues to be a pervasive threat to ocean life in Australia, with 10 marine parks totalling almost 13 million hectares, allowing bottom trawling.

Australia’s network of marine parks, which is the biggest in the world, covers more than half (52%) of Australia’s Commonwealth domestic waters, but not all parks are created equal. Australia’s Marine Parks Network is divided into different zoning categories, with each zone determining which activities are permitted and the level of protection provided. More than half of the Marine Parks Network allow industrial activities like industrial fishing and oil and gas mining. This includes zoning types that allow destructive fishing by longliners and bottom trawlers, who pillage underwater wonderlands, rip up coral and indiscriminately and violently catch any animal in their path, including turtles, seals and dolphins, all within areas labelled a marine park.

The Federal government has commenced a review into the majority of Australia’s Commonwealth Marine Parks Network management plans. This presents an opportunity to ban industrial activities from our marine parks and create more ocean sanctuaries.

Australia’s waters are some of the most unique and abundant places on earth, and are a global hotspot of biodiversity. Vibrant coral reefs and wondrous wildlife like endangered turtles, dolphins, and whales, some found nowhere else on earth, call Australia’s waters home. 

Australia’s network of marine parks is the biggest in the world. It covers 52 per cent of Australia’s domestic waters, but more than half of the network allows destructive, extractive industries like seismic blasting, industrial fishing and oil and gas mining. Longliners and bottom trawlers frequent these marine parks, looking for fish but catching everything in their path. 

In May 2026, Greenpeace Australia Pacific’s campaigning vessel Oceania traveled to Jervis Bay Marine Park and Hunter Marine Park to document their beauty, the wildlife under threat and aim to expose the industrial fishing activities in these so called protected waters.

Greenpeace is calling on the federal government to ban industrial activities from the marine parks network, create more fully protected ocean sanctuaries and connect the network to new high seas ocean sanctuaries.

Report: Trawling the Bottom Line

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Sewing and Painting the Future

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The iconic Greenpeace ship hosts community and family activities over the weekend from 27-30 April, including banner-making workshops and tours of the ship, culminating in a community paddle out for the climate and ocean at South Beach.
© Harriet Spark / Grumpy Turtle Film / Greenpeace

The banner drop is a distinctive part of the Greenpeace repertoire.

The moment of the unfolding is intrinsically dramatic. It is the reveal; when the moral and scientific truth of a situation is unveiled to the world. The wrong is being labelled—not through a written submission, or a social media post, or a statement in a meeting—but in words emblazoned in real physical space, chosen and occupied with precision, for all to see. There is jeopardy and transgression. And there are consequences—for the activists and for Greenpeace, as well as for the target of the communication. One of the reasons the banner remains such an effective tool in our toolbox is because of its undeniable clarity in cutting through, driving change and accountability in a way that few other tactics can. It is naming the wrong: in giant, clear letters.

We’ve hung these massive messages at environmental crime scenes, corporate headquarters, and iconic landmarks; on government buildings, ships and planes—in locations all around the world, for years.

My own memories unfurl even as I write this, but because the campaign to stop Woodside at Scott Reef is so pressing, what immediately springs to mind are two of our banners in that campaign: one on a crane outside their Perth HQ, and another on some of their corroding industrial junk at sea. What about you? Is there a particular banner that you picture when you think of Greenpeace?

The banners can attract global attention, but they have quiet beginnings. Each one is made by hand, often by volunteers. It is the invisible labour behind each spectacular public moment. One of the key pieces of equipment in our workshop at Rainbow Warrior House is the sewing machine. Sometimes our workshop is full of people and noise; at others it is quiet, the only sound being the gentle, purposeful, whir and buzz of a banner being sewn. It is usually our warehouse manager, Kieran Holmes, on the tools, head over the machine, carefully pouring over the raw canvas or tarp as the banner takes shape. Kieran’s one of those people who seems to be able to turn his hand to almost anything, but you wouldn’t know it because he’s old-school modest. In addition to being incredibly skilled, Kieran’s an all-round beaut human to have in the heart of our headquarters; never too busy to take the time to show a newcomer, or curious visitor, around his domain. 

Once the banner is sewn up, the lettering needs to be outlined. This is done on a magnetic wall—a fit-for-purpose feature at Rainbow Warrior House, where the banner is held up with magnets, and the edges of the letters neatly traced from a projection.

Next comes the painting. It usually starts late in the afternoon, sometimes going into evenings and weekends, with volunteers, staff, mates crowded around, brushes in hand. It is a calming meditative feeling of shared purpose, giving each letter its visual heft, the colour building power and presence with each stroke.

Then you stand back, stretch, and look at the message, now ready.

S A V E S C O T T R E E F

Throughout history, every great push for social change has required some form of invisible labour; preparation in the form of quiet things seldom seen, but vital. It is the enabling work of love instantiated in action. And of course, so much of the time it has been women who have done this labour, so that the men could get the chance to make the speeches and stand on the podiums. The inaugural Greenpeace voyage to stop nuclear testing in 1971 had a male-only crew, but wouldn’t have happened without the ideas and work of women behind the scenes.

It is what we do together, after all, that changes the world. Sometimes that work happens on a stage, a ship on the wild seas, or up the side of a building. But mostly, it is the hidden diligence of those who care and contribute to all the enabling work that makes a change once thought impossible, inevitable. It is Kieran at his sewing machine. It was Dorothy Stowe doing the administrative work of the ‘Don’t Make A Wave Committee’ that became Greenpeace.

When we think of social change, it is the sturm and drang that we remember. The drop of the banner, the chant of the crowd, the raising of the new flag. But look behind the curtain, and there’ll be a crew of people who are taking responsibility for the administration, the sewing and the painting, making the food, checking the bus timetables, getting stuff done. And behind them are even more handsinvisibly donating time and trust; the financial, material and expert resources that make it all possible. There’s love, camaraderie and know-how at every stage.

We are social and cooperative creatures by nature. And we human beings have been stitching for millenia, sewing the possibilities of our common future. Political and corporate bullies and algorithmically manipulative platforms would have us forget this, and abandon who we are. But we should be in no doubt that the brighter prospects for ourselves and life on earth continue to be stitched and painted; collaboratively and with love, by the diligent hands of millions of people who care, each day, in every community and city across the world.

With Love,

David


Q & A

I always get great questions when interviewing prospective new team members. One that came up again recently was: “Is Greenpeace actually one organisation?”

Around the world, people know Greenpeace by our one global name, united by a shared mission: securing an Earth capable of nurturing life in all its magnificent diversity, with a particular focus on climate and biodiversity. Behind the scenes, though, we’re organised as a network of 25 legally autonomous national and regional offices, including Greenpeace Australia Pacific, working alongside Greenpeace International.

That structure gives us the best of both worlds: we work together leveraging the power of a global network on the issues that matter most, while each office remains legally independent and deeply connected to the communities, cultures and political realities where we’re embedded. Local knowledge informs global action, and global collaboration strengthens and supports local campaigns.

It’s a model that has enabled Greenpeace to take on some of the world’s biggest challenges for over five decades–while withstanding challenges and attacks from governments and corporations. Global enough to tackle global problems, local enough to understand our communities and the natural places we love.

If you’re curious to learn more, you can read about the Greenpeace Global Network structure here.

Sewing and Painting the Future

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