Impact of Economic Growth and Population Aggregation on Urban Environmental Quality and Its Regional Differentiation:A Case Study of 74 Cities Implemented the New Standard for Air Quality during the First Stage
研究了经济增长和人口聚集对74个首批实施空气质量新标准城市的环境质量影响，发现京津冀地区影响最大，长三角次之，珠三角最小；中部省会城市影响最高，东部最低。
In order to evaluate the impact of economic growth and population aggregation on urban environmental quality and seek for a practical path to improve it from the source, this paper takes 74 cities implemented the new standard for air quality during the first stage as the study area and calculates the overall efficiency of urban economic growth and population aggregation based on the data envelope analysis model. This model takes the economic and population indicators as the input and the urban air quality index as the output. The result can represent the impact of economic growth and population aggregation on urban environmental quality. It shows that within three urban agglomerations the impact in the Beijing- Tianjin- Hebei Region is higher than it's in the Yangtze River Delta with 26.0 percent and the impact in the Yangtze River Delta is higher than it is in the Pearl River Delta with 11.2 percent. Within the provincial capitals, the impact on urban environment in the Central China is the highest and the next is in the Northeast China.Thirdly, it's in the Western China and the last one is in the Eastern China. Because of the rapid industrialization and urbanization, the investment pulls the high- speed development in metallurgy, energy and heavy chemical industry, real estate industry. The land finance policy pushes the continuing increase of population density which leads to the air pollutant emission concentration in local area of city during a short time. It has exceeded the atmospheric environmental capacity. It's the main reason which leads to the dramatic decrease of the urban environmental quality. Therefore, we must begin with the environmental effect source, speeding up the economic transition and pushing the population urbanization with a proper and orderly speed in order to improve the urban environmental quality.