What are examples of overpopulation issues?
War, decrease of resources, pollution, conflicts, sanitary problems
Overpopulation cause pollution. Mexico city, for example, is overpopulated and air pollution is an issue.
Overpopulation cause traffic problems. When you wait longer with your car, you cause atmospheric pollution.
In some instances, overpopulation cause wars and conflicts (such as some parts of Africa).
Overpopulation led heavy use of resources (including China).