Time series analysis of PM pollution risk based on the supply and demand of PM removal service: a case study of the urban areas of Beijing.

Demonstrating the temporal changes in PM pollution risk in regions facing serious PM pollution problems can provide scientific evidence for the air pollution control of the region. However, research on the variation of PM pollution risk on a fine temporal scale is very limited. Therefore, we developed a method for quantitative characterizing PM pollution risk based on the supply and demand of PM2.