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<正>Only in recent years has there been a coherent,consistent,complete,and combined database that allows systematic examination of how environmental health risks,such as those from air and water pollution,change with age,sex,risk factor,and region in the world.Here I use this Comparative Risk Assessment dataset,which was developed as part of the Global Burden of Disease Project,to examine two transition frameworks that have been postulated to describe how risks change as nations develop:the Environmental Kuznets Curve in which risks are hypothesized to first rise and then fall with development,and the Risk Transition in which spatial scale(household,community,global) defines the character of the changes in risk as development proceeds.Environmental risks will be compared to other important health risk factors,such as malnutrition and smoking,and special attention will be paid to the health risks from climate change,which exhibit relationships with development that are different from any other major risk factor.The situation of China will be highlighted.