The impact of China's super urban agglomeration strategy on industrial pollution.

This study examines the relationship between industrial agglomeration and industrial pollution. The empirical results for the entire sample show that industrial pollution has a significant spatial spillover effect. Specifically, for every 1% point increase in industrial pollution in neighboring regions, industrial pollution in the region increases by 0.33% points. Industrial pollution shows an inverse U-shaped change with industrial agglomeration. There is a significant positive linear relationship between domestic industrial agglomeration and industrial pollution. And there is a significant inverted U-shaped relationship between domestic industrial agglomeration and industrial pollution. Furthermore, heterogeneous results are observed among different urban agglomerations, with a significant inverse U-shaped relationship between industrial agglomeration and pollution in the Guangdong-Hong Kong-Macao-Great Bay Area, the Yangtze River Delta, and the Middle Reaches of Yangtze River and a significant U-shaped relationship in Beijing-Tianjin-Hebei.