La veille

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.

Young people will be exposed to a number of heatwaves that no one would have experienced in pre-industrial times. Young people will be exposed to a number of heatwaves that no one would have experienced in pre-industrial times.

Have you ever thought about what would happen if all life in the ocean disappeared? A recent study explores this extreme scenario to understand how ocean biology shapes the past, present, and future climate. The ocean plays a critical role in regulating Earth's climate. It is a massive carbon store that absorbs about 25% of human-caused emissions and thus helps maintain a relatively low CO2 level in the atmosphere. But what would happen if all marine life—from the tiniest plankton to the largest whales—disappeared? A recent study delves into this extreme scenario to uncover the crucial role that ocean biology plays in mitigating climate change.

Sarah Knapton Science Editor Sarah Knapton Related Topics Climate change, Sun, United Kingdom 22 April 2025 8:17pm BST Experiments to dim sunlight to fight global warming will be given the green light by the Government within weeks. Outdoor field trials which could include injecting aerosols into the atmosphere, or brightening clouds to reflect sunshine, are being considered by scientists as a way to prevent runaway climate change. Aria, the Government’s advanced research and invention funding agency, has set aside £50 million for projects, which will be announced in the coming weeks.

Sous l’impulsion du duo Donald Trump-Elon Musk, l’exécutif américain a annoncé de nombreux licenciements dans l’administration. Difficiles à suivre et à compter, ces coupes dans les effectifs révèlent les cibles prioritaires de la Maison Blanche.

Engagé de longue date dans le soutien aux parents d’enfants neuroatypiques, le président des Etats-Unis défend des positions archaïques sur l’autisme. Depuis vingt ans, sa vision est influencée par la fille d’un couple d’amis, passée de l’errance médicale à un combat antivax. C’est l’histoire d’une lubie trumpiste pas comme les autres. En mars, le nouveau ministre de la santé des Etats-Unis, le lobbyiste Robert F. Kennedy Jr, a confié aux Centres de contrôle des maladies (CDC), la principale agence de santé du pays, la mission d’étudier le lien fantasmatique entre autisme et vaccination.

Morgan Stanley, JPMorgan and an international banking group have quietly concluded that climate change will likely exceed the Paris Agreement’s 2 degree goal.Top Wall Street institutions are preparing for a severe future of global warming that blows past the temperature limits agreed to by more than 190 nations a decade ago, industry documents show.

Researchers say Aardvark Weather uses thousands of times less computing power and is much faster than current systemsA single researcher with a desktop computer will be able to deliver accurate weather forecasts using a new AI weather prediction approach that is tens of times faster and uses thousands of times less computing power than conventional systems.

In november zal de COP30 plaatsvinden in Belém, Brazilië. Braziliaanse minister van Milieu- en Klimaatverandering Marina Silva wil dat er resultaten geboekt worden op de volgende COP. Het mag volgens haar niet uitdraaien op een feestelijk spektakel.

De Europese ‘omnibuswet’ draait de klok tien jaar terug en is een regelrechte aanval op noodzakelijke duurzaamheidsverplichtingen voor bedrijven, waarschuwt expert natuurlijke rijkdommen Wies Willems. ‘De lidstaten en het Europees Parlement mogen dit niet laten passeren.’

Climate change will fuel contests—and maybe wars—for land and resources.

Amid President Donald Trump’s attacks on government scientists and science funding, researchers are arranging rallies to “Stand Up for Science” in Washington, D.C., and nationwide on March 7

Le président américain a souvent exploité le conflit à des fins politiques. Mais il s’était toujours tenu à une position neutre, sans nier une « attaque » russe.

... An “acid” test of our interpretation will be provided by the 2025 global temperature: unlike the 1997-98 and 2015-16 El Ninos, which were followed by global cooling of more than 0.3°C and 0.2°C, respectively, we expect global temperature in 2025 to remain near or above the 1.5°C level. Indeed, the 2025 might even set a new record despite the present weak La Nina. There are two independent reasons. First, the “new” climate forcing due to reduction of sulfate aerosols over the ocean remains in place, and, second, high climate sensitivity (~4.5°C for doubled CO2) implies that the warming from recently added forcings is still growing significantly.

An international group of scientists, led by King's College London, has revealed how continued global warming will lead to more parts of the planet becoming too hot for the human body over the coming decades. the amount of landmass on our planet that would be too hot for even healthy young humans (18 to 60-year-olds) to keep a safe core body temperature will approximately triple (to 6%)—an area almost the size of the US—if global warming reaches 2°C above the preindustrial average.