What are the reasons for environmental migration?

There are three main factors of environmental migration: one is the overloaded area where the total population exceeds the environmental capacity of the population. This is the root cause of environmental migration. Mainly reflected in the lack of food and water resources, poor sanitation and other diseases, living in poverty, and even unable to survive.

Second, in areas with large population and environmental capacity, the population is not saturated, which makes environmental migration possible. The population distribution on the earth is uneven, and some areas are almost saturated, such as India. However, due to natural environment, climate and other reasons, some areas are sparsely populated or even sparsely populated. Such as Antarctic States, Arctic States, desert regions, etc.

The third is the will of immigrants. Including forced migration by compulsory means, so as to realize environmental migration.