Why is there smog?

Formation factors of smog

1. It is the physical basic source of particulate dust. China has the largest loess plateau in the world, and its soil texture is the easiest to generate particulate dust particles.

2. It is poor movement that causes dust. For example, if the mud in the garden in the middle of the road and the soil on the curb of the street flows to the road after raining or splashing water, it will cause a lot of dust after being dried up for one hour. Even if these particulate substances fall back to the ground, they will be thrown over the city again because of the continuous passing of cars.

3. It is that the basic source of dust and the process of motion difference gather in a certain spatial range, and the particles finally gather with water molecule nodules to form haze. At present, in more than 35 cities in the Loess Plateau region of China, the three elements of smog structure are quite abundant.

Smoggy weather has existed since ancient times, and human activities or natural phenomena such as slash-and-burn and volcanic eruption may lead to foggy weather. However, after human beings entered the era of fossil fuels, the smog weather really threatened the living environment and health of human beings. Rapid industrialization and urbanization lead to rapid energy consumption, high population concentration and ecological environment destruction, which all lay the groundwork for the formation of haze weather.

Extended information:

Smog control

The most important way to control smog is to reduce emissions. At present, the large-scale use of various fossil fuels is the main cause of haze weather. Think about it, power generation needs to burn coal, but in fact less than 3% of the burned coal is converted into electricity, and the rest is discharged.

Cars, ships and other machinery need oil. Similarly, engines only convert less than 3% of the oil into power, and the rest are also discharged. That is to say, we are "extravagant" in using energy, using less and emitting more. It is unrealistic to reduce the use of energy, and clean energy is far from meeting the demand and expensive.

if 7% of the existing energy can be utilized and 3% of the energy can be discharged, the environmental problems and energy problems will be solved at the same time, and human society will also get sustainable development.

also, it is to plant more trees. Afforestation is of great significance for regulating climate, conserving water and reducing air pollution. Because trees can absorb carbon dioxide and release oxygen. But also can resist wind and sand.

it can also beautify the environment. According to different management purposes and characteristics, artificial afforestation can be divided into five types: timber forest, shelter forest, economic forest, firewood forest and special purpose forest. Such as bamboo willow, oleander, locust tree, camphor tree, yew, etc. This requires the participation of the whole people, which can not only beautify the homeland, reduce the harm of soil erosion and sandstorm to farmland, but also effectively improve the carbon storage capacity of forest ecosystem.

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