For the world population to reach 5 billion, it took thousands of years. It was in 1987 that the global population touched 5 billion mark and now after 32 years, the world population is reaching 8 billion.
Currently, the world population is 7.7 billion. By 2050, the global population is expected to add another 2 billion people.
Since 2010, 27 countries have seen their population shrink by 1%, as per the UN. Due to sustained lower levels of fertility, this was made possible especially in China and Japan.
The global fertility rate dropped from 3.2 births per woman in 1990 to 2.5 in 2019. It is expected to decline further. But these shrinkages are limited in comparison to the population increase in sub-Saharan Africa and other countries.
In 2050 the global life expectancy is expected to increase to 77.1 years from 72.6 years.
Overpopulation can fuel many issues like pollution, crime, global warming, malnutrition, poverty, etc. So this increasing figure is alarming, to say the very least. We need to play a collective role in controlling the world population by taking necessary steps.