Australian tropical rainforest trees switch in world first from carbon sink to emissions source

Researchers say carbon emissions change in Queensland tropical rainforests may have global climate implications

Australian tropical rainforest trees have become the first in the world to switch from being a carbon sink to an emissions source due to increasingly extreme temperatures and drier conditions.

The change, which applies to the trees’ trunks and branches but not the roots system, began about 25 years ago, according to new research published in Nature.

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Wednesday briefing: The new, devastating flood risk facing nearly all of Britain

In today’s newsletter: Flooding is predicted to become so bad that some towns may need to be abandoned, and it’s not even campaigners raising the alarm – but insurers

Good morning. For years, whenever I read about parts of Britain being wrecked by flooding, it always felt like something distant – because until your house is flooded, it’s hard to imagine it happening, isn’t it? Not any more.

According to a Guardian investigation, millions more homes across England, Scotland and Wales are at risk of devastating floods. In England alone, the number of properties exposed to flooding is expected to rise by more than a quarter, from 6.3m to 8m. The story gets worse for those in high-risk areas for flash flooding – which is harder to predict and protect against – where the frequency could surge by up to 66% by 2050. The picture is so bleak that, startlingly, some towns may one day have to be abandoned altogether.

Israel-Gaza war | The fragile ceasefire in Gaza faced its first test on Tuesday when Israel said the flow of aid into the devastated Palestinian territory would be cut by half and the crucial Rafah border crossing with Egypt would not open as planned, blaming Hamas for delays in the return of bodies of hostages.

UK child abuse inquiry | Keir Starmer’s national grooming gangs inquiry has stalled amid wrangles over its remit and difficulties in finding a senior legal figure willing to become its chair, the Guardian has been told.

Economics | The global economy has shown “unexpected resilience” to Donald Trump’s tariffs, but the full impact is yet to be felt, the IMF has warned. The forecast for economic growth in the UK has also been modestly increased, from 1.2% to 1.3% this year – though slightly downgraded next year, also to 1.3%.

Madagascar | Andry Rajoelina, the president of Madagascar, has said he fled the country in fear for his life after a military rebellion but did not announce his resignation in a speech broadcast on social media. They were Rajoelina’s first public comments since the a military unit called Capsat turned against his government in an apparent coup.

Music | D’Angelo, the Grammy-winning R&B singer who helped pioneer the sound of neo-soul, has died after a struggle with pancreatic cancer. He was 51.

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New Zealand accused of ‘full-blown climate denial’ over cuts to methane reduction targets

Farmers praised the move, but scientists and opposition parties criticised it as ‘weak’ and ‘unambitious’

Environmental campaigners have accused New Zealand’s government of “full-blown climate denial” after it slashed targets for reducing emissions of methane, a potent greenhouse gas that contributes to global warming.

New Zealand’s right-leaning coalition government outlined plans on Sunday to reduce methane emissions by between 14 and 24% by 2050, compared to 2017 levels.

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Planet’s first catastrophic climate tipping point reached, report says, with coral reefs facing ‘widespread dieback’

Unless global heating is reduced to 1.2C ‘as fast as possible’, warm water coral reefs will not remain ‘at any meaningful scale’, a report by 160 scientists from 23 countries warns

The earth has reached its first catastrophic tipping point linked to greenhouse gas emissions, with warm water coral reefs now facing a long-term decline and risking the livelihoods of hundreds of millions of people, according to a new report.

The report from scientists and conservationists warns the world is also “on the brink” of reaching other tipping points, including the dieback of the Amazon, the collapse of major ocean currents and the loss of ice sheets.

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Australia’s household energy bills will halve by 2050, modelling suggests

Grattan Institute report argues fall in costs will provide federal government room for more action on climate

Australian household energy bills will halve by 2050 as solar panels, batteries and electric cars and appliances become the norm, reducing pressure on the federal government over living costs and creating room for more climate action, a thinktank study suggests.

Modelling by the Grattan Institute finds that cutting greenhouse gas emissions from electricity generation in line with the goal of reaching net zero emissions by 2050 will cut average household energy costs from about $5,800 today to about $3,000.

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Prince William to attend Cop30 UN climate summit in Brazil

Prince of Wales’s decision welcomed as a means of drawing attention to the event and galvanising talks

The Prince of Wales will attend the crunch Cop30 UN climate summit in Brazil next month, the Guardian has learned, but whether the prime minister will go is still to be decided.

Prince William will present the Earthshot prize, a global environmental award and attend the meeting of representatives of more than 190 governments in Belém.

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‘Humanitarian’ visa must be created for Pacific Islanders displaced by climate crisis, experts say

Calls for reform to allow people across the Pacific threatened by climate crisis to more easily migrate, particularly to New Zealand

Climate and migration experts are calling for urgent action to create legal pathways for people displaced by the climate crisis, as a new report highlights the scale of the problem across the Pacific.

Research by Amnesty International released on Thursday found current immigration systems are inadequate for Pacific Islanders seeking safety and stability, as rising seas threaten to make their homelands uninhabitable.

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More than 40 Trump administration picks tied directly to oil, gas and coal, analysis shows

Report looks at White House nominees and appointees and agencies dictating energy, environment and climate policy

Donald Trump has placed dozens of people with ties to the fossil fuel sector in his administration, including more than 40 who have directly worked for oil, gas or coal companies, according to a new analysis.

The report from Public Citizen, a consumer advocacy and ethics non-profit that has been critical of the Trump administration, alongside the Revolving Door Project, a corporate watchdog, analyzed the backgrounds of nominees and appointees within the White House and eight agencies dictating energy, environmental and climate policy. That includes the Environmental Protection Agency, the interior and energy departments and others.

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Tour operator Intrepid drops carbon offsets and emissions targets

Firm will instead invest A$2m a year in ‘climate impact fund’ supporting renewables and switching to EVs

One of the travel industry’s most environmentally focused tour operators, Intrepid, is scrapping carbon offsets and abandoning its emissions targets as unreachable.

The Australian-headquartered global travel company said it would instead invest A$2m (£980,000) a year in an audited “climate impact fund” supporting immediate practical measures such as switching to electric vehicles and investing in renewable energy.

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New Zealand oceans warming 34% faster than global average, putting homes and industry at risk, report finds

NZ$180bn worth of housing and $26bn of infrastructure at risk of flooding and storm damage, new government report finds

New Zealand’s oceans are warming 34% faster than the global average, with NZ$180bn (US$104bn) worth of housing at risk of flooding, a new report about the nation’s marine environment has revealed.

The ministry of the environment and Stats NZ’s three-yearly update, Our Environment 2025, collates statistics, data and research across five domains – air, atmosphere and climate, freshwater, land, and marine – to paint a picture of the state of New Zealand’s marine environment.

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Glacier melt will lead to ice-free peaks in California for first time in human history

New research shows massive glaciers in Sierra Nevada projected to melt away by the beginning of the next century

Deep in California’s Sierra Nevada, massive glaciers are disappearing and projected to melt away completely by the beginning of the next century, leaving ice-free peaks for the first time in human history, new research has found.

The mountain range’s glaciers are older than previously known, dating back tens of thousands of years, with some as old as the last ice age, according to an article published last week in Science Advances.

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Media and political attacks on Australia’s emissions targets ‘straight out of the climate obstruction playbook’, expert says

Prof Christian Downie points to the Business Council of Australia and News Corp newspapers as examples of deliberate obstruction

Political and media attacks on renewable energy and climate action in Australia in recent months have come “out of the climate obstruction playbook” that has been honed over decades around the world by fossil fuel interests.

Prof Christian Downie, an Australian researcher, says he has studied techniques used by business groups and lobbyists all over the world which are now being seen in Australia.

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Cause of Gold Coast mass fish kill unknown with marine heatwave most likely culprit, scientists say

Local community group says whatever the cause ‘kids shouldn’t be in the water’ with dead fish

Queensland authorities are investigating the deaths of thousands of fish that washed up on a popular Gold Coast beach.

The state environment department said dead baitfish had been observed at The Spit, at the northern end of the Gold Coast since last Wednesday, but no obvious source of pollution had been found.

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Wildfires are getting deadlier and costing more. Experts warn they’re becoming unstoppable

Of 200 fires in the past 44 years, half of the fires that cost US$1bn or more were in the last decade

Wildfires tore through central Chile last year, killing 133 people. In California, 18,000 buildings were destroyed in 2018 causing US$16bn (A$24bn, £12bn) in damage. Portugal, Greece, Algeria and Australia have all felt the grief and the economic pain in recent years.

As the headlines, the death tolls and the billion dollar losses from wildfires have stacked up around the world, so too have the rising temperatures – fuelled by the climate crisis – that create tinderbox conditions.

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Native forest logging must end in order to reach Labor’s emissions reduction target, expert says

Murray Watt says ‘it’s not the government’s intention to stop old growth logging’ as Greens and academics press for total halt

The Albanese government is being urged to end old growth logging “at a minimum” in order to meet a 2035 emissions reduction target recommended by the Climate Change Authority.

One of Australia’s most respected forest scientists, Prof David Lindenmayer, of the Australian National University, has also written to the authority questioning why it did not go further in its advice and recommend an end to all native forest logging.

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Abnormally hot days may hit Australia’s south-east after rare sudden warming over Antarctica

Phenomenon extremely unusual in southern hemisphere and last occurred in 2019 when it contributed to worsening of black summer bushfires

A rare rise in stratospheric temperatures over Antarctica could influence weather into summer, with previous events driving hotter and drier conditions for south-east Australia.

The phenomenon – called sudden stratospheric warming – is extremely unusual in the southern hemisphere.

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‘History will remember who showed up’: Keir Starmer faces call to attend Cop30 summit

Response from leaders and key climate figures comes after PM’s aides advised non-attendance over concerns Reform may attack him

Leading climate figures and Labour MPs have urged Keir Starmer to attend the crucial Cop30 climate summit this November, after aides advised him not to attend for fear of attracting the ire of the Reform party.

Simon Stiell, the UN’s climate chief, said: “Cop30 is where leaders are expected to come and roll up their sleeves, make deals to help their nation’s economy transition faster, creating more jobs, and guide the world on what next steps we take together.”

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Big trees in Amazon more climate-resistant than previously believed

Forest is ‘remarkably resilient to climate change’, but remains under threat from fires and deforestation

The biggest trees in the Amazon are growing larger and more numerous, according to a new study that shows how an intact rainforest can help draw carbon dioxide out of the atmosphere and sequester it in bark, trunk, branch and root.

Scientists said the paper, published in Nature Plants on Thursday, was welcome confirmation that big trees are proving more climate resilient than previously believed, and undisturbed tropical vegetation continues to act as an effective carbon sink despite rising temperatures and strong droughts.

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China has announced its first target to cut emissions in real terms. What does it mean for Australia?

With China accounting for nearly a third of the world’s total emissions, any cuts it achieves will make a substantial difference for the world – and for fossil fuel exports

Anything China does on energy and climate change is very big news. Its plans ripple around the world, whether that’s in changing the demand for fossil fuels or affecting the impacts on the planet from global heating.

On Thursday, Australia woke to the news that China’s president, Xi Jinping, had told the United Nations that for the first time his country was setting a target to cut – in absolute terms – its greenhouse gas emissions.

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