What are the types of environmental migrants?

Environmental migration refers to the population migration caused by the deterioration of the natural environment. Environmental migrants can be divided into three categories: First, environmental disaster migrants. Environmental migration caused by catastrophic environmental events such as floods, droughts, mudslides, landslides and earthquakes.

We can call all kinds of events that endanger animals and plants disasters. Many natural disasters, especially high-grade and high-intensity natural disasters, often induce other disasters to occur one after another. This phenomenon is called disaster chain. The earliest disaster in the disaster chain is called primary disaster; Disasters induced by primary disasters are called secondary disasters.

Natural disasters not only destroy the harmonious environment for human survival, but also trigger a series of other disasters, which are generally called derivative disasters. If there is an irreversible disaster in the environment where human beings live and can no longer survive, we should consider environmental migration.

The second is ecological migration. Environmental migration caused by ecological environment degradation such as desertification, desertification and soil erosion.

Environmental disasters in Africa, Asia and Latin America, soil erosion is very serious due to the continuous disappearance of forest vegetation, over-exploitation of cultivated land and over-grazing of pasture. The bare land becomes fragile and cannot resist the long-term wind and rain erosion.

In some places, the annual soil loss reaches 0/00 ton per hectare/kloc. In addition, due to the overuse of chemical fertilizers, toxic dust related to air pollution falls to the ground, mud is sprayed everywhere, and hazardous waste is discarded everywhere, which are irreversible pollution to the land. When the environmental pollution in a certain area is extremely serious and human beings cannot survive, environmental migration must be considered.

The third is environmental pollution immigration. Immigration caused by environmental pollution incidents. At present, the global industry is developing rapidly, the urban population is expanding rapidly and the air pollution problem is serious. People expect a good living environment, which also promotes the emergence of environmental pollution immigrants.