La veille

L'un des plus grands centres de données de Meta (ex-Facebook) en Europe devrait voir le jour en Espagne. Quelques militants tentent d'éveiller les habitants sur ses conséquences néfastes. En vain.

La part des data centers dans la consommation d'électricité en Irlande augmente à un rythme qui inquiète de nombreux observateurs.

The story of Greenland keeps getting greener—and scarier. A new study provides the first direct evidence that the center—not just the edges—of Greenland's ice sheet melted away in the recent geological past and the now-ice-covered island was then home to a green, tundra landscape.

The Center for Climate Integrity (CCI) helps communities hold oil and gas corporations accountable for the massive costs of climate change.

Pour nourrir les immenses besoins de ChatGPT et autres outils d’intelligence artificielle, le secteur de la tech multiplie les centres de données. Ces usines du numérique sont de plus en plus nombreuses, de plus en plus puissantes et de plus en plus voraces en énergie. Un boom mondial dans lequel la France compte prendre sa part.

In Virginia, a small conservation group is leading the fight against the powerful and secretive data center industry.

Dans son nouveau livre Vallée du silicium, Alain Damasio s’est rendu à San Francisco afin de mettre à l’épreuve sa pensée technocritique et de comprendre comment cette région a façonné et façonne encore le monde d’aujourd’hui.

Over the past 50 years, humans have extracted the Earth’s groundwater stocks at a steep rate, largely to fuel global agro-economic development. Given society’s growing reliance on groundwater, we explore ‘peak water limits’ to investigate whether, when and where humanity might reach peak groundwater extraction. Using an integrated global model of the coupled human–Earth system, we simulate groundwater withdrawals across 235 water basins under 900 future scenarios of global change over the twenty-first century. Here we find that global non-renewable groundwater withdrawals exhibit a distinct peak-and-decline signature, comparable to historical observations of other depletable resources (for example, minerals), in nearly all (98%) scenarios, peaking on average at 625 km3 yr−1 around mid-century, followed by a decline through 2100. The peak and decline occur in about one-third (82) of basins, including 21 that may have already peaked, exposing about half (44%) of the global population to groundwater stress. Most

De plus en plus nombreux, les centres de données, piliers du numérique, sont gourmands en électricité et en foncier, mais aussi en eau. Une consommation amenée à exploser avec le développement de l’intelligence artificielle.

Simultaneous harvest failures across major crop-producing regions are a threat to global food security. Concurrent weather extremes driven by a strongly meandering jet stream could trigger such events, but so far this has not been quantified. Specifically, the ability of state-of-the art crop and climate models to adequately reproduce such high impact events is a crucial component for estimating risks to global food security. Here we find an increased likelihood of concurrent low yields during summers featuring meandering jets in observations and models. While climate models accurately simulate atmospheric patterns, associated surface weather anomalies and negative effects on crop responses are mostly underestimated in bias-adjusted simulations. Given the identified model biases, future assessments of regional and concurrent crop losses from meandering jet states remain highly uncertain. Our results suggest that model-blind spots for such high-impact but deeply-uncertain hazards have to be anticipated and acc