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According to the lowest United Nations estimates, the globe will have two billion more people living on it by the year 2050. At that point, the population may actually shrink because, though life expectancy may continue to rise, the average number of children each person gives birth to is poised to drop below 2.1. What demographic variable might make the global population drop?

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maryasay

Answer: Fertility

Explanation:

Fertility can affect the rate of population growth if the fertility rate is less than the level required to maintain the current population. Not to be confused with fecundity which refers to the ability to bear children, fertility is the actual number of children a woman bears.  The current Average rate is three children compared to the fecundity rate which is almost seven times this number.

The projected birth rates for 2070 and 2100 are 2.1 births and 2 births per woman respectively. This can result in  a shrinking world population despite higher life expectancy.

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