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More than half of global population growth between now and 2050 is expected to occur in Africa. Africa has the highest rate of population growth among major areas. The population of sub-Saharan Africa is projected to double by 2050. A rapid population increase in Africa is anticipated even if there is a substantial reduction of fertility levels in the near future. Regardless of the uncertainty surrounding future trends in fertility in Africa, the large number of young people currently on the continent, who will reach adulthood in the coming years and have children of their own, ensures that the region will play a central role in shaping the size and distribution of the world’s population over the coming decades.

https://www.un.org/en/global-issues/population