Influence factors of PM2.5 reduction—based on economic data analysis

Starting from China’s environmental issues to study the impact of environmental protection fiscal expenditures on PM2.5 concentration reduction. This article uses the panel data of 30 provinces (except Hong Kong, Macao, Taiwan and Tibet) from 2007 to 2017, and uses PM2.5 concentration levels in China’s provinces as an explained variable. The results of the panel regression model shows that environmental protection fiscal expenditures have a significant positive effect on PM2.5 reduction environmental policy tools have a significant positive regulatory effect on environmental protection fiscal expenditures and PM2.5 reduction. Increasing environmental protection fiscal expenditures is conducive to promoting PM2.5 reduction