Jean-Baptiste Fressoz

Alors que l’ampleur des suppressions et des créations d’emplois liées à l’IA reste peu quantifiable, les premiers impacts de cette technologie sur le travail deviennent tangibles, notamment dans les métiers créatifs ou intellectuels.

87%. That’s how much the emissions of NVIDIA (worth 5 trillion dollars) increased in 2024, as an article from TruthDig is one of the only sources in the world to point out. This means it became the world’s most valuable company by answering soaring demand for AI… whilst doubling its carbon footprint. Not to mention water: Samsung’s next ‘mega-cluster’ of GPU fabs will consume half of Seoul’s water, says the same article.

Depuis les années 1970, la région de Gabès, dans l'est de la Tunisie, vit dans les fumées d'un immense complexe de transformation de phosphate, un minerai utilisé dans la création d'engrais agricoles. Dénonçant de nombreux impacts environnementaux et sanitaires, la population réclame désormais le démantèlement du site.

The Atlantic meridional overturning circulation (AMOC) is an important tipping element in the climate system. There is a large uncertainty whether the AMOC will start to collapse during the century under future climate change, as this requires long climate model simulations which are not always available. Here, we analyze targeted climate model simulations done with the Community Earth System Model (CESM) with the aim to develop a physics-based indicator for the onset of an AMOC tipping event. This indicator is diagnosed from the surface buoyancy fluxes over the North Atlantic Ocean and is performing successfully under quasi-equilibrium freshwater forcing, freshwater pulse forcing, climate change scenarios, and for different climate models. An analysis consisting of 25 different climate models shows that the AMOC could begin to collapse by 2063 (from 2026 to 2095, to percentiles) under an intermediate emission scenario (SSP2-4.5), or by 2055 (from 2023 to 2076, to percentiles) under a high-end emission scenar

Bad climate news is everywhere. Africa is being hit particularly hard by climate change and extreme weather, impacting lives and livelihoods. We are living in a world that is warming at the fastest rate since records began. Yet, governments have been slow to act.

2024 was the hottest year on record [1], with global temperatures exceeding 1.5 °C above preindustrial climate conditions for the first time and records broken across large parts of Earth’s surface. Among the widespread impacts of exceptional heat, rising food prices are beginning to play a prominent role in public perception, now the second most frequently cited impact of climate change experienced globally, following only extreme heat itself [2]. Recent econometric analysis confirms that abnormally high temperatures directly cause higher food prices, as impacts on agricultural production [3] translate into supply shortages and food price inflation [4, 5]. These analyses track changes in overall price aggregates which are typically slow-moving, but specific food goods can also experience much stronger short-term price spikes in response to extreme heat.

Planet Earth is living on borrowed time, a new global report reveals. The world must stop burning fossil fuels now and take urgent steps to reduce global warming.

Au cœur de la conférence mondiale qui se déroule cette semaine à Nice, l’océan est un élément incontournable de notre système climatique. Tour d’horizon des impacts du dérèglement du climat sur les mers du globe, et des ressources qu’elles nous offrent pour lutter.

La Conférence des Nations unies sur l’océan, qui se tient à Nice du 9 au 13 juin, va confier à une structure intergouvernementale une gigantesque boîte à outils destinée à mieux prévoir les impacts du changement climatique.

Le réchauffement planétaire aura des impacts de plus en plus marqués dans notre pays. Des chercheurs se sont penchés sur les perspectives en Wallonie. Déjà, dans un monde à 2 ºC, très probable, la facture s’élèverait à près de deux milliards par an.