When I was born, in 1981, the world population (the total number of living humans on Earth) was 4,5 billion. Today, according to medium fertility estimate by the United Nations - Department of Economics and Social Affairs, the estimate number is 7,3 billion .
Cool "clock population"
http://www.worldometers.info/world-population/
United Nations
Department of Economics and Social Affairs
http://www.un.org/en/development/desa/index.html
See you later,
Bye bye!
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