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focusclimat agriculture climat
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
L'agriculture est prise dans une boucle vicieuse, car l'agriculture industrielle est à la fois le moteur du changement climatique et en souffre. Pour nous aider à sortir de la crise climatique et à maintenir la production alimentaire, les entreprises de biotechnologie prétendent avoir la réponse : de nouveaux organismes génétiquement modifiés (OGM) . Ce nouveau briefing des Amis de la Terre Europe démystifie cette fausse promesse qui fait obstacle à des solutions réelles et déjà éprouvées comme l'agroécologie.
La Cour des comptes européenne signale, dans un rapport spécial, que les financements agricoles de l'Union destinés à l'action pour le climat n'ont pas contribué à réduire les émissions de gaz à effet de serre dues à l'agriculture.
When we hike through the woods, drive by a cornfield, or mow our lawns, we tend to focus on the plants: the blooming flowers, the tassel-topped stalks, and the green grass borders. But what about the dirt? It seems soil is one of the planet’s most underappreciated natural resources. Yet healthy soil is the foundation for agriculture; it also plays a vital role in protecting the air we breathe, the water we drink, the food we eat—and even our climate.
Only if there is a fundamental change in the way we manage land we can reach the targets of climate-change mitigation, avert the dramatic loss of biodiversity and make the global food system sustainable.
gnd cnr focusclimat co2 réchauffement climatique urgence ges gaz à effet de serre épidémie coronavirus urgence sanitaire santé,focussanté,économie pandémies crise alimentaire alimentation agriculture resalim
Aujourd’hui reconnue comme une discipline essentielle, l’agroécologie est hissée par les milieux scientifiques au premier rang des solutions face au changement climatique. L’agroécologie respecte les écosystèmes naturels et intègre les dimensions économiques, sociales et politiques de la vie humaine. Elle conçoit une approche globale qui concilie agriculture, écologie, productivité, activité humaine et biodiversité.
The centerpiece of the early anthropogenic hypothesis is the claim that humans took control of greenhouse-gas trends thousands of years ago because of emissions from early agriculture ( [32] and [33]). A common reaction to this claim is that too few people lived thousands of years ago to have had a major effect on either land use or greenhouse-gas concentrations.
