What is the main reason why the content of air pollutants in winter is obviously higher than that in other seasons?

1. In winter, the weather is cold, and most parts of China are controlled by the Siberian high in Mongolia, and the downdraft is the main one, which is prone to inversion in winter and the pollutants are not easy to spread.

At present, China's energy structure is still dominated by coal, which causes great pollution.

It's very cold in winter in northern China, and a lot of energy, such as coal, is burned for heating. Most coal has not undergone desulfurization treatment and gasification reaction before use, and the combustion is not sufficient, and the smoke and sulfur dioxide waste gas are discharged more, which aggravated the pollution.