Key points from article :
Globally women on average have 2.4 children in their lifetime, which is known as total fertility rate.
South Korea spent about £106bn between 2006 and 2018 trying to encourage its population to reproduce.
Having one fewer child reduces a parent’s carbon footprint by 58 tonnes of CO2 a year.
Maximum world population would reach somewhere between 10bn and 12bn by the end of the century.
