What are the human factors that lead to the formation of large-scale haze weather?

There are several reasons for the smog weather.

1, low pressure and no airflow are the main factors. Because the air does not flow, the tiny particles in the air gather and float in the air.

2. The ground is dusty, the air humidity is low, and the dust stirred up by people and traffic on the ground.

3. Automobile exhaust is the main pollutant emission.

4. Secondary pollution produced by factories.

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

6. Urban buildings are getting taller and denser, which not only makes the air not like to circulate when the air pressure is low, but also makes it worse. Moreover, the tension generated by the building surface will contribute to the formation of smog.

7. There are fewer and fewer floors in the city that can produce capillary phenomena, so that not only dry fine particles on the ground are easy to form smog, but also the smog particles are not easily absorbed by the ground, so that the smog will rise and fall, leading to circulation and difficult to cure.

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