1 is the physical basic source of particulate matter. China has the largest loess plateau in the world, and its soil texture is the easiest to produce granular dust particles.
It is bad exercise that leads to dust. For example, the mud in the garden in the middle of the road and the soil on the roadside stones will flow to the road after raining or splashing water, which will produce a lot of dust after one hour of drying. Even if these particles fall back to the ground, they will be thrown over the city again because of the continuous passing of cars.
3. It is a process in which the basic sources of dust and movement differences gather in a certain spatial range, and particles finally gather with water molecules to form smog. At present, in more than 350 cities in the Loess Plateau of China, the three elements of smog structure are quite rich.
Haze weather has existed since ancient times, and human activities or natural phenomena such as slash-and-burn and volcanic eruption may lead to haze weather. However, after mankind entered the era of fossil fuels, the smog weather really threatened the living environment and health of mankind. Rapid industrialization and urbanization lead to rapid energy consumption, high concentration of population and destruction of ecological environment, which have laid the groundwork for the formation of haze weather.
Extended data:
Haze governance
The main way to control smog is to reduce emissions. At present, the extensive 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 30% of coal is converted into electricity, and the rest is discharged.
Cars, ships and other machinery need oil. Similarly, the engine only converts less than 30% oil into power, and the rest is discharged. In other words, we are "extravagant" in using energy, using less and emitting more. It is unrealistic to reduce the use of energy. Clean energy is far from meeting the demand and is expensive.
If the existing energy can be utilized by 70% and discharged by 30%, environmental problems and energy problems will be solved at the same time, and human society will be sustainable.
Also, there are many kinds of trees. Afforestation is of great significance for regulating climate, conserving water and reducing air pollution. Because trees can absorb carbon dioxide and release oxygen. It can also 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.
Baidu encyclopedia-smog