➔ 
Les champs auteur(e)s & mots-clés sont cliquables. Pour revenir à la page, utilisez le bouton refresh ci-dessous.
filtre:
système
Added complexity allows an economy to grow, even as resource limits are reached. But at some point, the complexity itself becomes a problem.
On estime qu'entre 100 millions et un milliard d'oiseaux meurent chaque année en heurtant des bâtiments aux États-Unis, les lumières artificielles jouant un rôle majeur dans ce bilan. Mais les effets de la pollution lumineuse sur le monde naturel seraient encore bien plus importants.
Poland is planning to build a wall along its border with Belarus, primarily to block migrants fleeing the Middle East and Asia. But the wall would also divide the vast and ancient Białowieża Forest, a UNESCO World Heritage site which harbours more than 12,000 animal species and includes the largest remnants of primeval forest that once covered most of lowland Europe.
abs_empty
The world must rewild and restore an area the size of China to meet commitments on nature and the climate, says the UN, and the revival of ecosystems must be met with all the ambition of the space race. Existing conservation efforts are insufficient to prevent widespread biodiversity loss and ecosystem collapse, the global body has warned at the launch of the decade on ecosystem restoration, an urgent call for the large-scale revival of nature in farmlands, forests and other ecosystems.
