Why is there smog in Chengdu?

Chengdu is located in Sichuan Basin, which is affected by Qinling Mountains, Daba Mountain, western plateau, Yunnan-Guizhou Plateau in the south and eastern hills in the north, so it is difficult to discharge polluted air. At the same time, the topography of the basin also leads to less wind, which makes it difficult to dilute and take away the polluted air. Construction site: There are too many construction sites in Chengdu, not only in the suburbs, but also in the urban areas, and the dust prevention measures at the construction sites are not perfect;

In autumn harvest season, the smog weather is mainly a lot of smoke and dust generated by burning straw around, which forms this particularity of Sichuan Basin.

The formation of smog generally has the following reasons:

First, the dust on the construction site.

Second, automobile exhaust emissions.

Third, heating in winter and emissions from coal-fired power plants.

Fourth, the humidity near the ground is relatively high, and the particles in the air gather and condense.

Fifth, industrial spraying emissions.

Sixth, the emissions in the production process of some factories.