How is the haze weather formed and what are the reasons?

A: First, the relative humidity of the air near the ground in these areas is relatively high, and the dust on the ground is relatively high, which is stirred up 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, tiny particles in the air gather and float in the air;

Third, the sky is clear and partly cloudy, which is conducive to radiation cooling at night, so that the air with relatively high humidity near the ground is saturated and condensed 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.