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How we got to a population of 7 billion

7 Billion: How Did We Get So Big So Fast? Watch as global population explodes from 300 million to 7 billion.

As higher standards of living and better health care are reaching more parts of the world, the rates of fertility — and population growth — have started to slow down, though the population will continue to grow for the foreseeable future.

U.N. forecasts suggest the world population could hit a peak of 10.1 billion by 2100 before beginning to decline. But exact numbers are hard to come by — just small variations in fertility rates could mean a population of 15 billion by the end of the century.

Brought to you by npr.org.

Brought to you by npr.org

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