Flux continu

Une étude montre comment les futures conditions climatiques affecteront la culture d'espèces cruciales pour la sécurité alimentaire mondiale.

Le député écologiste Boris Tavernier promeut une loi sur la Sécurité sociale de l'alimentation. Dans ce Grand entretien, il décrit le projet comme « le plus enthousiasmant depuis des décennies ». Le texte sera étudié jeudi 20 février à l'Assemblée.

Le projet de loi d’orientation agricole veut consacrer la « souveraineté alimentaire » comme intérêt majeur de la France. Une formule qui cache une bataille entre deux visions de l’agriculture, paysanne ou industrielle.

The world could fall short of food by 2050 due to falling crop yields, insufficient investment in agricultural research and trade shocks, according to Joe Biden’s special envoy for food security, Dr Cary Fowler. Fowler, who is also known as the “father” of the Svalbard Global Seed Vault, a global store of seeds for the most significant crops, said studies by agricultural economists showed the world needed to produce 50-60% more food by 2050 in order to feed its growing population. But crop yields rates were projected to decline by between 3-12% as a result of global heating.

Vers des systèmes alimentaires low-tech

Depleted soil leads to reduced yields, forcing farmers to rely on fertilizers that raise food production costs, consumer prices.

Après deux siècles de libre échange et d’ouverture des systèmes agro-alimentaires, la notion de souveraineté alimentaire revient en force dans le débat public. Illustration sur l’île de La Réunion.

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

Global Report on Food Crises (GRFC) 2024

À Cadenet, village du Vaucluse, des habitant·es ont réfléchi ensemble, durant plusieurs mois, à leurs aspirations pour une alimentation désirable. Leur convention citoyenne locale a débouché sur la création (…)