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Doubling time

Doubling time is the time it takes for a particular level of population to double in size. A fairly accurate doubling time estimate can be computed by taking the annual growth rate and dividing it by seventy. At 2 percent annual growth, world population (5.5 billion in 1996) will double in size (to 11 billion) in about thirty-five years (2031), assuming the annual growth stays constant.

Category: Sociology
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