What are the causes of heavy air pollution in Beijing, Tianjin and Hebei in autumn and winter?

What are the causes of heavy air pollution in Beijing, Tianjin and Hebei in autumn and winter? First of all, pollutant emissions seriously exceed more than 50% of the environmental capacity, and air pollutant emissions in Beijing, Tianjin and Hebei remain high all the year round. Secondly, the concentration of nitrogen oxides and volatile organic compounds in the atmosphere is high, which is very easy to transform gaseous pollutants in the air and accelerate the growth rate of secondary PM2.5 Finally, the climatic conditions in Beijing-Tianjin-Hebei region lead to the reduction of environmental capacity, which is also an indispensable condition in the formation of heavy air pollution.

Heavy and chemical industries gather around Beijing, Tianjin and Hebei, and the energy utilization mode is mainly coal, which leads to high air pollution emissions in this area all the year round; Moreover, heating is needed in winter in the north, which produces a lot of air pollution emissions. The perennial road transport mode has also increased the emissions in the atmosphere. The high concentration of nitrogen oxides and volatile organic compounds in the atmosphere is the reason for the rapid formation and growth of secondary PM2.5 These substances in the atmosphere enhance the oxidation of the atmosphere, which is conducive to the secondary transformation of gaseous pollutants and form fine particles in the air. These fine particles are the main components of serious air pollution.

The climate environment in Beijing, Tianjin and Hebei is not very good. Because of its weak wind area and warm cover structure in troposphere, the atmospheric diffusion conditions in this area are not good. Once air pollution is produced, it is difficult to spread, so it gradually accumulates in the same area, forming serious air pollution. The environmental capacity of this area is relatively small, especially in autumn and winter, which is smaller than that in spring and summer. Due to the influence of climate, air pollution in autumn and winter is more serious.

All pollution is the result of human activities. Reduce air pollution emissions, take corresponding measures against man-made emissions, control pollution emissions, and avoid serious pollution caused by extreme weather. For a better life, we should cherish the living environment; Environmental pollution will only bring disaster to mankind in the end.