10 Most Populated Countries in 2100

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3. Nigeria 

Projected Population in 2100: 545 million 

Nigeria, Africa’s most populous country, is undergoing rapid population growth driven by high fertility and declining mortality rates. From the current population of 213 million, it is projected to escalate to 545 million by 2100. The young demographic structure, with a notable proportion under 15, would contribute to this growth.

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