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An argument for space colonization is to mitigate proposed impacts of overpopulation of Earth, such as resource depletion. [216] If the resources of space were opened to use and viable life-supporting habitats were built, Earth would no longer define the limitations of growth.
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 Global Footprint Network purports to be able to measure how much the human economy demands against what the Earth can renew. [13] [14] The Optimum Population Trust (now called Population Matters) has listed what they believe is the overshoot (overpopulation) of a number of countries, based on the above. [15]
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The more dramatic phrasing of "the living outnumber the dead" also dates to the 1970s, a time of population explosion and growing fears of human overpopulation in the wake of decolonization and before the adoption of China's one-child policy. The claim that "the living outnumber the dead" was never accurate.
Californians for Population Stabilization; Center for Biological Diversity; Earth Policy Institute; National Commission for the Observance of World Population Year 1974
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Earth Overshoot Day – Calculated calendar date when humanity's yearly consumption exceeds Earth's replenishment; Overpopulation – When a population of a species exceeds the carrying capacity of its environment; Overshoot (population) – Phenomenon in which populations temporarily exceed carrying capacity of environment