Question

Why there is rapid increase in population

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.

Answer 2

1)Due to high birth rate.
2)Due to population migration.