Many areas in Beijing have suffered from serious air pollution. Why is the pollution more serious in winter?

This has a lot to do with the unique climatic conditions in winter in northern China. The weather is cold every winter, and a lot of coal is needed for heating. Moreover, these coals will produce a large number of airplanes in the process of burning, so many places in the north will cause serious air pollution. Moreover, there are less windy weather in winter in the north, and the air flow is relatively small, so pollutants will stay in the atmosphere for a long time and it is difficult to disperse, which leads to more serious pollution.

First of all, for the vast northern regions, due to the low temperature in winter, the temperature in many northern regions will reach below 0℃, especially in the northeastern region further north. In many places, the lowest temperature in winter can reach MINUS ten degrees Celsius, and in such a low temperature environment, people must get enough warmth to survive. Collective heating is an important way to solve the heating problem in modern society.

At present, in China, the way of collective heating is to burn coal for heating, which means burning coal for heating. However, in the process of burning coal, a lot of waste gas will be produced, which is also an important cause of urban pollution. For most places, burning coal is the most economical and convenient heating method. Although the country has introduced many new energy sources, it is difficult to popularize new energy sources because of its low cost and inconvenient use. Most cities still rely on coal for heating.

Secondly, for the winter in the north, the temperature is relatively low and the wind is relatively small. For most areas, there is no wind, and pollutants in the air are hard to be blown away by the wind, so they will stay on the street and eventually form smog. For the north, the less windy weather, the more serious the air pollution in this area will be. Therefore, for most areas, air quality is related to windy weather. If there are many windy days, the air quality will be better.