How many people lived in the world in 1972
boys ,girls, and together
In 1972, the world's population was at 3.8 billion. This was after a 1.98% growth rate from 1971 because then the population was at 3.7 billion people. Get detailed world population on http://www.unep.org/geo/geo3/english/085.htm and http://www.geohive.com/earth/his_history3.aspx.