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What is human population overpopulation?

Human overpopulation (or human population overshoot) describes a concern that human populations may become too large to be sustained by their environment or resources in the long term. The topic is usually discussed in the context of world population, though it may concern individual nations, regions, and cities.

Does human overpopulation cause environmental problems?

About half of the world population lives in nations with sub-replacement fertility. The concept of human overpopulation, and its attribution as a cause of environmental issues, are controversial.

Why do people fear overpopulation?

They fear an “underpopulation bomb” with a very long fuse. The truth is that human population is complicated, and there may be 8 billion ways to be wrong about it. Fevered fears about overpopulation ignore the fact that the carrying capacity of the Earth is not and never has been fixed.

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