World population crosses 8-billion mark- Key points
The global population is projected to reach eight billion on Tuesday, according to the ‘World Population Prospects 2022.
In 2023, India is anticipated to overtake China as the world's most populated nation.
According to the United Nations' (UN) most recent estimates, the world's population may reach 8.5 billion people in 2030 and 9.7 billion by 2050.
Between 2022 and 2050, the populations of 61 nations are expected to decline by 1% or more as a result of low fertility rates and, in some circumstances, high emigration rates.
More than half of the projected increase in the global population up to the year 2050 will be concentrated in eight countries:
Congo, Egypt, Ethiopia, India, Nigeria, Pakistan, the Philippines and the United Republic of Tanzania.
Global life expectancy at birth reached 72.8 years in 2019, an improvement of almost nine years since 1990.
It is anticipated that further mortality declines will lead to an average worldwide lifetime of roughly 77.2 years in 2050.
But in 2021, the least developed nations' life expectancy lagged 7 years behind the average worldwide.