Long Term Causality Analyses of Industrial Pollutants and Meteorological Factors on PM2.5 Concentrations in Zhejiang Province

Recently with the accelerating process of urbanization, environmental degradation in air quality, especially the concentrations of PM
_2.5
, has posed a heavy threat to the economic development and human life. To further clarify the cause of haze, in this paper we quantitatively analyzed different factors impacted on PM
_2.5
by establishing twelve joint regression models. Four industrial pollutants and eight meteorological factors were processed in the form of time series from a large number of monitoring data in Zhejiang province of China, and also the significant causality influence of each component which strongly correlates with PM
_2.5
was discussed. Results show that PM
_2.5
is sensitive to temperature and wind speed, and its formation is mainly due to NO
₂
, followed by SO
₂
and CO, especially in the region of Hangzhou.