并列题名：Analysis on the path of optimizing economic development by environmental protection Analysis on the path of optimizing economic development by environmental protection 并列题名：Research on the impact of urban economic development on environmental air quality in China 并列题名：Analysis and evaluation on the economic development of county in China 并列题名：Study of the impact of regional economic development on ecological environment and its efficiency 并列题名：Analysis and devaluation on the economic development of county in China 并列题名：Analysis and evaluation on the econoic development of county in China Research on the impact of urban economic development on environmental air quality in China 并列题名：Analysis of law and economics on legal systems of environment regulation