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Based on the Environmental Kuznets Curve(EKC)hypothesis, this paper use the method of principal component analysis(PCA)to extract ChangshaZhuzhou-Xiangtan’s ecological environmental pollution factors. Regression models was taken to verify the interactive effect between Changsha-Zhuzhou-Xiangtan’s economic development and ecological environment degradation which by using Changsha-ZhuzhouXiangtan’s gross domestic product(GDP)per capita and sulfur dioxide, nitrogen oxides ,total suspended particulate emission data from 1990 to 2010. The result shows that the fitting curve between environmental pollution factors and GDP per capita is conform to environmental Kuznets curve. Changsha-ZhuzhouXiangtan enters to EKC’s later stage which ecological environment degradation begins to falls with GDP per capita increasing. KeywordsEconomic Development; Ecological Environment Degradation; Environmental Kuznets Curve; Principal Component Analysis; Changsha-Zhuzhou-Xiangtan

Interactive Effect between Economic Development and Ecological Environment Quality in Changsha-Zhuzhou-Xiangtan Based on EKC Hypothesis