| It was described the overall situation of U.S. air pollutant discharge permitting system, including type ＆ scope, threshold ＆ process, content ＆ execution status. It was also pointed out that the whole process of U.S. new or modified pollution sources and existing stationary sources were all under supervision by pre construction permitting and operation permitting system. Finally, for the problems of air pollutant discharge permitting system in China, some proposals were put forward, including further improving legal support, strengthening metrological system building and permitting system executing, etc. |
