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内容説明 This book presents a state-of-the-science overview of global change and its consequences for human societies. It highlights four areas of critical importance - food， water resources， air quality and the carbon cycle - from both science and policy perspectives， and points the way towards the new scientific approaches needed to study the Earth System in the future. The book also summarises recent advances in understanding in global change science: the climate system， global biogeochemistry， land-ocean interactions and changing land cover and the Earth System.