Why did the smog come at once? Do you really blame automobile exhaust?

Haze is a term to describe weather conditions, which can be divided into two words: fog and haze. The former is largely related to natural weather, while the latter is closely related to human activities. Below, the author will analyze several major reasons for the formation of smog for everyone.

Fog is a natural phenomenon that the visibility of the near-surface atmosphere is reduced due to high humidity or high concentration of ice crystal particles. The reasons for fog formation are as follows:

1. Too much precipitation When a certain area encounters heavy precipitation, many tiny water droplets will condense in the air due to the evaporation of water vapor. When the concentration of these tiny water droplets reaches a certain level, they will turn into fog, which will lead to the decline of visibility in this area.

Second, the terrain affects that fog is very easy to form in mountainous areas or basins, because there are dense trees and much water in mountainous areas, and the air is not circulated, so the water in the air is not easy to evaporate or disperse. Because the basin area is low-lying and the air pressure sinks, water is not easy to rise and gather in the air, which is easy to form foggy weather.

Haze refers to the weather situation in which the visibility of the air decreases when the concentration of inhalable particles and other substances in the air reaches a certain level. The causes of haze formation can be roughly summarized as follows:

1. The smog of industrial pollution mostly occurs in areas with developed heavy industry, because industrial pollution in heavy industry areas emits more wastes such as sulfur dioxide and sulfuric acid. When the concentration of heavy metal particles or inhalable particles in the air reaches a certain level, it is easy to form smog.

Second, automobile exhaust pollution automobile exhaust will emit a lot of carbon dioxide, which will drive the dust on the ground and increase the concentration of inhalable particles in the air. Therefore, the higher the car penetration rate and the lower the vegetation coverage rate in an area, the easier it is to form smog. Therefore, although the first-tier cities are short of land and gold, they still need to keep proper green space to purify the air.

Haze is a weather condition formed after haze meets fog in the air. Generally, it is haze first and then fog. Automobile exhaust is the main cause of smog, but it is not the main cause.

What else do you know about foggy days? Please leave your opinion in the comments section below!