How did the global soil crisis, soil pollution and desertification happen? Analyze it from the perspective of soil formation

1, (the most important natural factor) drought, evaporation is greater than precipitation, living inland, far from the sea, it is difficult to get in touch with marine water vapor. Surrounded by mountains, the Qinghai-Tibet Plateau is blocked.

It's windy.

3. Close to the source of the winter wind (Siberia), the terrain is small and there is no mountain block, which makes the wind drive straight in.

4. The vegetation is scarce and the vegetation coverage rate is low.

5. Loose soil and desert (this is the basis of desertification).

6. A cold current to reduce the temperature and humidity.

Extended data

Governance measures:

Protect existing vegetation and strengthen forest and grass construction. While strengthening management, we should effectively solve the problems of population, livestock and stoves, and strictly protect the forest and grass vegetation in the sand area. Through afforestation, rational allocation of trees, shrubs and grasses, a multi-forest, multi-tree and multi-level three-dimensional protection system will be constructed to expand the proportion of forests and grasses.

While doing a good job in manual management, we should give full play to the self-repair function of the ecosystem, increase the intensity of enclosure and protection, and promote the natural restoration of ecology. Because aerial seeding has the characteristics of high speed, less labor, low cost and good effect, it is of greater significance to restore vegetation in remote and barren areas with sparse population, inconvenient transportation and barren hills.

Carry out a lasting ecological revolution in desertification areas to accelerate the reversal of desertification process. The key is to rationally allocate water resources and ensure ecological water use. For example, the unreasonable allocation system of water resources is the direct cause of the shortening of rivers, the shrinking or even drying up of lakes, the decline of groundwater level and land desertification in northwest China.

Strictly implement the family planning policy, control the excessive population growth and continuously improve the quality of the population. Improve the ideological level of the whole nation through publicity and education on environmental awareness.

Care and care for the environment, consciously participate in the transformation and construction of the environment, and form the fashion of the whole society. At the same time, in areas where local desertification is very serious, grasslands and cultivated land are almost completely abandoned, and the harsh natural environment is no longer suitable for human survival, the state should carry out ecological migration in a planned way.