With active economic growth and a huge number of citizens, China is considered as the largest developing country in the world. Due to urbanization, light pollution generalize is an environmental factor that significantly influences the quality and health of wildlife. According to Pengpeng Han et al., “In the 1990s, the increasing trend in light pollution regions mostly occurred in larger urban cities, which are mainly located in eastern and coastal areas, whereas the decreasing trend areas were chiefly industrial and mining cities rich in mineral resources, in addition to the central parts of large cities.” In the 2000s, nearly all urban cities were dominated by an uprising trend in light pollution. 
Welcome to the School of Graduate and Postdoctoral Studies' Electronic Theses & Dissertation site. These pages are dedicated to help you find all the information you might require in order to format and successfully submit your graduate thesis for examination and publication electronically.
Electronic Theses and Dissertations (ETDs) are prepared as text-based PDF files. ETDs can contain non-text elements such as sound, video, and hypertext links. ETDs are available through [email protected], Western's digital library repository, and also released to the world-wide web with priority in many search engines, enabling scholars worldwide to locate, search, and download the University of Western Ontario's ETDs.