Cause analysis and contermeasures of atmospheric pollution in Chengdu 并列题名:Cause analysis and contermeasures of atmospheric pollution in Chengdu Patent analysis and countermeasure research on solar energy application technology Climate-environmental responses and countermeasure study on atmospheric component changes 并列题名:Analysis and countermeasures on industrialization in Zheijiang Province study on the economic impacts and countermeasures of air pollution in China?