With the number still ticking up, where are we now? The figure for the current world population depends on where you look – ...

International migration is the only potential source of growth in the U.S. working-age population in the coming years.” Analyzing data from the Current Population Survey and the Job Openings and ...

The third and largest wave began in 1800 with the harnessing of fossil fuels. With enormous, cheap energy at its disposal, the human population grew rapidly from 1 billion in 1800 to 2 billion in 1930 ...