Source? Concern about overpopulation is an ancient topic. Particularly in China, where they introduced the one-child policy in 1979 which, according to the Chi

Source? Concern about overpopulation is an ancient topic. Particularly in China, where they introduced the one-child policy in 1979 which, according to the Chinese government, prevented an additional population growth of about 400 million until it was phased out in 2015.