Question

how does the population grow rapidly?​

Answer 1

This rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age... By 2000 the population counted 6 billion heads, however, population growth (doubling time) started to decline after 1965 because of decreasing birth rates.

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Answer 2

sudden decline in mortality rate and sudden increase in natality rate increases population