There is less and less smog. What is the cause of smog?

Haze is a kind of pollution to the atmosphere, especially those objects with a diameter less than 2.5 microns are the "culprits" that cause haze weather. Now there are more and more foggy weather, and the harm is getting bigger and bigger. Smog weather is included in the weather forecast in many areas of China, which plays an early warning role for people.

Haze has existed since ancient times and is seasonal. It is naturally formed and cannot be cured artificially. Don't violate and destroy the laws of nature, and human beings will be punished by nature.

The city is too crowded, the buildings are high and the industrial layout is unreasonable. The wind is not smooth and there is no way to blow away the pollution. Now our car ownership is also in the forefront of the world. Too narrow city streets lead to traffic congestion and concentrated exhaust emissions. This city should be expanded and leveled. Let the air circulate.

Smog weather is not unique to modern society, it has existed since ancient times. In ancient times, due to natural phenomena such as volcanic eruption, it was possible to cause haze weather. After modern human beings enter the era of fossil fuels, coupled with the increase of population, the discharge of waste in life and other aspects has increased, and the haze weather has also increased.

1. Industrial pollution. At present, China's industrial structure is biased, mainly relying on traditional energy sources with high energy consumption and heavy pollution, such as steel and cement industries.

2. Topographic factors. There are many basins in China's inland areas, and it is difficult to discharge and spread pollutants, which aggravates pollution in winter.

3. Climatic reasons. In winter, the weather is stable and there is little cold wind, which leads to the accumulation of pollutants.

In recent ten years, the reason why the wind on the earth's surface is small is that there are more and more high-rise buildings. The burning of coal and oil makes the surface temperature higher and higher, and the air pressure in various places is relatively stable, thus lacking the conditions for wind. Without wind, the self-purification ability of the atmosphere is getting worse and worse, which makes the smog exist for a long time.

Meteorologists say that meteorological factors are the decisive factors. Once there are weather conditions that form smog, no matter how to prevent it, smog will still form. There are more cities than rural areas because high-rise buildings prevent the convective cloud system from sinking. The sky above the city is like a hood, and the smog is hard to disperse.