The world population has grown very rapidly.
Why?
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Exponential growth . the rate of growth is proportional to the size of the populatin. If couples on average have more than 2 children that survive long enough too have children themselves the population will increase .
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Answer:
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.
Explanation:
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