Answer:
According to UN estimates, the population of Africa may reach 2.5 billion by 2050 (about 26% of the world's total) and nearly 4.5 billion by 2100 (about 40% of the world's total). The population of Africa first surpassed one billion in 2009, with a doubling time of 27 years (growth rate 2.6% p.a.).
Step-by-step explanation: