The smog is getting less and less. What is the cause of the smog?

Haze is a kind of pollution to the atmosphere, especially those objects with a diameter less than 2.5 microns, which are the "culprits" of haze weather. Nowadays, there are more and more haze weather, and the harm is getting worse. , many areas in our country have included haze weather in weather forecasts, giving people an early warning.

Haze has existed since ancient times, and it is seasonal. It is formed naturally and cannot be cured by people. Do not violate the laws of nature or destroy the laws of nature, and humans will suffer. Nature's punishment.

The city is too densely populated, with tall buildings and unreasonable industrial layout. As a result, the wind is not smooth and there is no way to blow away the pollution. Now our car ownership is among the highest in the world. Too narrow urban streets lead to vehicle congestion and concentrated exhaust emissions. The city should be spread out evenly. Allow air to circulate.

Haze weather is not unique to modern society, it has existed since ancient times. In ancient times, natural phenomena such as volcanic eruptions may have caused haze weather. After modern humans entered the fossil fuel era, coupled with the increase in population, waste emissions from all aspects of life increased, and smog and haze weather also increased.

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

2. Topographic factors. In the inland areas of our country, there are mostly basins, which makes it difficult for pollutants to be discharged and spread, and the pollution is aggravated in winter.

3. Climate reasons. Winter weather is stable and there are few cold winds, leading to accumulation of pollutants.

In the past ten years, the reason why the wind on the earth's surface has been smaller is that more and more high-rise buildings have been built, the burning of coal and oil has made the surface temperature higher and higher, and the air pressure in various places has been relatively stable, resulting in a lack of Without wind, the self-purification ability of the atmosphere will become worse and worse, causing the haze to accumulate for a long time.

Meteorologists analyze that meteorological factors are the decisive factor. Once there are weather conditions that form haze, no matter how we prevent it, haze will still form. There are more cities than rural areas because high-rise buildings block the sinking of convective cloud systems. The sky above the city is like a lid, making it difficult for the smog to dissipate.