How is the haze weather formed?

First, the relative humidity of the air near the ground in these areas is relatively high, and the ground dust is relatively large, which is stirred by people and traffic on the ground;

Second, there is no obvious cold air activity, the wind is small and the atmosphere is relatively stable. Because the air does not flow, the tiny particles in the air gather together and float in the air.

Third, the sky is clear and partly cloudy, which is conducive to radiation cooling at night and makes the near-surface air with relatively high humidity saturate and condense to form fog.

Fourth, automobile exhaust is the main pollutant emission. In recent years, there are more and more cars in cities, and automobile exhaust is a factor of smog;

Five, secondary pollution produced by the factory;

Six, winter heating emissions of carbon dioxide and other pollutants.