Urban scale has a profound impact on environmental pollution.Theoretical analysis shows that the internal mechanism of urban scale expansion on environmental pollution can be attributed to scale effect,structure effect and technical effect.Based on the panel data of cities from 2007 to 2020,the empirical study in this paper shows that the expansion of urban scale at present can significantly improve the regional environmental pollution problems,and has inhibitory effects on different types of environmental pollution.The influence of urban scale expansion on environmental pollution is heterogeneous,among which the environmental pollution control effect of multi-center and low-density urban scale expansion is more prominent,and the inhibition effect of urban scale expansion on provincial capital cities and eastern cities is more obvious.Mechanism analysis shows that city scale can aggravate environmental pollution through scale effect,and at the same time,it can restrain environmental pollution through structural effect and technical effect.
city scaleenvironmental pollutioncharacteristic heterogeneity
NETL
NSTL
维普
万方数据
