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Rapporteur calls for defossilization of economies and urgent reparations to avert ‘catastrophic’ rights and climate harms

Extreme heat ‘the new normal’, says UN chief, as authorities across the continent issue health warnings

Economic assumptions about risks of the climate crisis are no longer relevant, says the communications expert Genevieve Guenther

For more than three decades, Brazilian climate scientist Carlos Nobre has warned that deforestation of the Amazon could push this globally important ecosystem past the point of no return. Working first at Brazil’s National Institute for Space Research and more recently at the University of São Paulo, he is a global authority on tropical forests and how they could be restored.

The Kenyan marine ecologist David Obura is chair of a panel of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), the world’s leading natural scientists. For many decades, his speciality has been corals, but he has warned that the next generation may not see their glory because so many reefs are now “flickering out across the world”.

The world has been too optimistic about the risk to humanity and planet – but devastation can still be avoided, says Timothy Lenton

Despite working on polar science for the British Antarctic Survey for 20 years, Louise Sime finds the magnitude of potential sea-level rise hard to comprehend

A subreddit tracking apocalyptic news in a calm, logical way comforts users who believe the end The threat of nuclear war, genocide in Gaza, ChatGPT reducing human cognitive ability, another summer of record heat. Every day brings a torrent of unimaginable horror. It used to be weeks between disasters, now we’re lucky to get hours.

Pourquoi la guerre nucléaire, et non la crise climatique, est la plus grande menace qui pèse sur l’humanité, selon Mark Lynas Mark Lynas a passé des décennies à faire pression pour que l’on agisse sur les émissions de gaz à effet de serre, mais il affirme aujourd’hui que la guerre nucléaire est une menace encore plus grande.

Iran’s parliament approved a measure to close the vital global trade route, through which more than a fifth of the world’s oil supply passes through daily

New data from Nasa has revealed a dramatic rise in the intensity of weather events such as droughts and floods over the past five years.The steepness of the rise was not foreseen. The researchers say they are amazed and alarmed by the latest figures from the watchful eye of Nasa’s Grace satellite, which tracks environmental changes in the planet.

When a small Swedish town discovered their drinking water contained extremely high levels of Pfas, they had no idea what it would mean for their health and their children’s future

False claims obstructing climate action, say researchers, amid calls for climate lies to be criminalised

Les scientifiques ont déclaré aujourd’hui que les océans de la planète sont en plus mauvaise santé qu’on ne le pensait, tout en avertissant qu’une mesure clé montre que nous « manquons de temps » pour protéger les écosystèmes marins. L’acidification des océans, souvent appelée le « jumeau maléfique » de la crise climatique, est causée par l’absorption rapide du dioxyde de carbone par les océans, où il réagit avec les molécules d’eau, entraînant une baisse du pH de l’eau de mer. Elle endommage les récifs coralliens et d’autres habitats océaniques et, dans les cas extrêmes, peut dissoudre les coquilles des créatures marines.

Breaching threshold would ramp up catastrophic weather events, further increasing human suffering

Mark Lynas has spent decades pushing for action on climate emissions but now says nuclear war is even greater threat Climate breakdown is usually held up as the biggest, most urgent threat humans pose to the future of the planet today. But what if there was another, greater, human-made threat that could snuff out not only human civilisation, but practically the entire biosphere, in the blink of an eye?

Guardian investigation finds almost 7,000 proven cases of cheating – and experts says these are tip of the iceberg

Exclusive: Climate.gov, which supports public education on climate science, will soon no longer publish new contentA major US government website supporting public education on climate science looks likely to be shuttered after almost all of its staff were fired, the Guardian has learned.

There’s frustration among researchers that falling pH levels in seas around the globe are not being taken seriously enough, and that until the buildup of CO2 is addressed, the consequences for marine life will be devastating

Ocean acidification has already crossed a crucial threshold for planetary health, scientists say in unexpected finding

La pandémie et les lois sévères ont étouffé les mouvements climatiques tels que nous les connaissions. Préparez-vous à un nouveau type d’action. […] Le mouvement a remporté des victoires impressionnantes. Sa première exigence, « dire la vérité », a été essentiellement honorée lorsque le Royaume-Uni est devenu le premier pays au monde à déclarer officiellement une urgence climatique, quelques jours après la fin de la rébellion d’avril. Le mouvement a également suscité un sentiment d’urgence parmi le public.

A new point in history has been reached, entomologists say, as climate-led species’ collapse moves up the food chain even in supposedly protected regions free of pesticides

On 21 April 2019, I was on Waterloo Bridge in London with my younger siblings. Around us were planters full of flowers where there were once cars, and people singing. This was the spring iteration of Extinction Rebellion, when four bridges in London were held by protesters. My siblings, then 14, had been going out on school strike inspired by Greta Thunberg, and wanted to see her speak.

Toxic pollution from wildfires has infiltrated the homes of more than a billion people a year over the last two decades, according to new research. The climate crisis is driving up the risk of wildfires by increasing heatwaves and droughts, making the issue of wildfire smoke a “pressing global issue”, scientists said.

Paper in Nature Climate Change journal reveals major role wealthy emitters play in driving climate extremes. The world’s wealthiest 10% are responsible for two-thirds of global heating since 1990, driving droughts and heatwaves in the poorest parts of the world, according to a study.

The faces are different, but it’s the same authoritarianism. Keir Starmer’s team might not look or sound like Donald Trump’s, but its policies on protest and dissent are chillingly similar. So is the reason: coordinated global lobbying by the rich and powerful, fronted by rightwing junktanks.

Temperatures south Asians dread each year arrive early as experts talk of ever shorter transition to summer-like heat

Une majorité silencieuse de la population mondiale souhaite une action climatique plus forte. Il est temps de se réveiller. Environ 89 % des citoyens souhaitent que leurs gouvernements fassent davantage pour lutter contre la crise climatique, mais ils ne savent pas qu’ils constituent la majorité. Le Guardian s’associe à des dizaines de rédactions du monde entier pour lancer le projet 89 % et mettre en évidence le fait que la grande majorité de la population mondiale souhaite une action en faveur du climat.

Action urgently needed to save the conditions under which markets – and civilisation itself – can operate, says senior Allianz figure

A superpower in the fight against global heating is hiding in plain sight. It turns out that the overwhelming majority of people in the world – between 80% and 89%, according to a growing number of peer-reviewed scientific studies – want their governments to take stronger climate action.