Why is the smog in Changsha so serious?

There are several reasons for the smoggy weather in Changsha:

1. The main factor when the atmospheric pressure is low and the air does not flow. Because the air does not flow, the tiny particles in the air gather together and float in the air.

2. The ground is dusty and the air humidity is low. People and vehicles on the ground stir up dust.

3. 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.

4. Secondary pollution produced by factories.

5. CO2 and other pollutants emitted by heating in winter.

The best response is to go out as little as possible. Because there are large and small particles in haze weather, which seriously endanger health, particles will attach to the respiratory tract after entering the body, causing bronchitis and pharyngitis. In particular, the elderly and patients with respiratory diseases with relatively weak resistance should reduce their travel, or wear masks to protect their bodies when exercising outdoors.