With the acceleration of urbanization

population and motor vehicles have increased largely

various pollution problems are becoming more and more serious

among which air pollution has been the focus of public attention in recent years. In this context

the air quality situation in the central urban area of Yichun City was studied for nearly 4 years. The overall situation of winter air quality was analyzed by comparing air quality changes

primary pollutant changes

mean concentration of pollutants

and significant differences. The results show that the air quality of Yichun city center in winter is greatly influenced by human factors. The air quality has improved obviously by eliminating or weakening human factors.