Today， to Chinese people， theenvironmental protection issueon the country's agenda not onlyconditions the sustainable developmentof economy but also directly relatesto people's life quality. Besides waterpollution， air pollution has been takingaway health and good environment fromthe mankind while the auto emission ac-counts for the biggest contributor to airpollution.

注：本文中所涉及到的圖表、注解、公式等內(nèi)容請(qǐng)以PDF格式閱讀原文