This article tries to assess PM2.5 regulation program from strategic objectives,policies and supporting measures;also analyizes the challenges faced by Beijing. To sum up the experience of the European Union,Japan and the United States to control air pollution,and forward the following suggestions for Beijing's PM2.5 regulation: the priority is to deal with PM2.5 produced by vehicles;establish ecological compensation and regional joint prevention and control mechanism;to publish the PM2.5 data and raise the level of public participation.
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