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of Africa first surpassed one billion in 2009, with a doubling time of 27 years (growth rate 2.6% p.a.).

Population growth has continued at almost the same pace, and total population is expected to surpass 2 billion by 2038 (doubling time 29 years, 2.4% p.a.).

The reason for the uncontrolled population growth since the mid 20th century is the decrease of infant mortality and general increase of life expectancy without

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