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Which countries will double their population by 2050?

The World Population Data Sheet (2020) shows that the global population is forecasted to grow from 7.8 billion in 2020 to 9.9 billion by 2050. This level represents a rise of higher than 25 percent from 2020.

Which countries will double their population by 2050?
First map - Medium-fertility is used; second map - low-fertility variable is used; the third map - high fertility variable is used. (Reddit user: abu_doubleu)

More than 50% of the world population growth between now and 2050 is expected to occur in Africa.  Africa has the most significant rate of population increase among other continents.

The population of Sub-Saharan Africa is predicted to double by 2050. Africa to move the world's population towards 10 billion by 2050.

Nowadays, Sub-Saharan Africa is the youngest region globally, where 46 percent of the population is under age 15.

Angola and Benin are forecasted to rise by at least 150 percent of their contemporary population between 2020 and 2050, while Niger's population is supposed to increase by about 175 percent.

Nigeria's population is set to double to more than 400 million by 2050 when it has overtaken the United States as the world's 3rd most populous nation.

Reasons for a predicted doubling in population in Sub-Saharan countries include enhanced quality of life combined with no immediate drop in birth rates.

38 nations, including Armenia, Germany, and South Korea, are forecasted to have a smaller population in 2050 than in 2020.

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