The weather in Hangzhou is so polluted these days, and the smog phenomenon is serious. Where are the main sources of pollution?

Fog and haze can reduce visibility, but they are two different phenomena.

The attribute of fog is "wet", which is a phenomenon that the air near the ground cools and the water vapor in the air condenses into tiny water droplets suspended in the air when the water vapor is sufficient, the breeze and the atmosphere are stable.

To form fog, two conditions must be met, one is that the temperature drops, and the other is that the air is humid. The most prone time to fog in Hangzhou is from 10 to 12 every year, and the average foggy day in urban areas is about 35 days per year.

Haze is "dry". When it appears, the relative humidity of the air is not large, but there are many small particles of pollutants in the air, so it looks gray.

Fog and haze can affect the line of sight. For drivers, it is especially necessary to slow down. In addition, smog will harm human health, so neither of them is so likable.

The sources of smog pollution are generally: the ecological environment is destroyed; Highly polluting enterprises; Increase in vehicles; Enterprise pollutant discharge, etc.