在未来数十年美国将面临前所未有的环境和经济挑战,其中最主要的将包括气候变化、海平面上升、天气格局的改变、淡水减少及其质量下降以及生物多样性的丧失。要应对面临的这些挑战,将需要包括从全球、国家到区域和地方的各种尺度上的深思熟虑的、基于科学的协同响应。美国联邦? The United States will face unprecedented environmental and economic challenges in the decades to come. The most significant of these will include climate change, sea level rise, changes in weather patterns, declines in freshwater and its degradation, and loss of biodiversity. Addressing these challenges will need to include well-thought-out, science-based synergies at all scales, from the global, national to regional and local levels. United States?