What is environmental migration?

Environmental migration refers to the population migration caused by the deterioration of the natural environment on which people live; The reasons include natural disasters, ecological environment degradation, environmental pollution and other environmental factors. Environmental migrants caused by catastrophic environmental events such as floods, droughts, mudslides, landslides and earthquakes are called "environmental disaster migrants"; Environmental migration caused by desertification, desertification, soil erosion and other ecological environment degradation can be called "ecological migration"; Environmental migrants caused by environmental pollution incidents can be called "environmental pollution migrants".