Canying Zeng

1. Introduction Urbanization is a complex and multifaceted process involving demographic, economic, and environmental processes. At present, China’s urbanization has become a notable global event, regarded as one of the two key factors deeply influencing urban sustainable development in the 21st century [1,2,3]. Risk from urban environmental pollution and degradation is becoming an explicit threat to human health because of rapid economic growth and urbanization [4,5].