Overpopulation or a chronic victim, population explosion, is a statistical state whereby the number of an organism exceeds the resistance of its habitat. size or population density, which is the ratio of the population to the resources it can sustain, the resource use measures and the distribution used by that population. If for an environment of 10 people, but only enough water and food for 9, then in a closed system where there is no commercial relationship, that environment is overpopulated; If the population is 100 but there is enough food, shelter and water for 200 people for the unlimited future, then it is not a population overcrowding. So we need to do it strictly and adhere to The above regulation would otherwise disrupt the ecological balance system.

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