Population density

measurement of population per unit area or unit volume

practice of controlling rate of growth

region on world map with more people inside than outside

demographics of country

Overpopulation or overabundance is a state in which the population of a species is larger than the carrying capacity of its environment. This may be caused by increased birth rates, lowered mortality rates, reduced predation or large scale migration, leading to an overabundant species and other animals in the ecosystem competing for food, space, and resources. The animals in an overpopulated area may then be forced to migrate to areas not typically inhabited, or die off without access to necessary resources.

social policy aimed at maintaining at or reducing the size of a population to a certain level