How Population Works
From the smallest tribe to the largest nation, important decisions are based on questions like: How many of us are there? How are we divided? Where are we going? Do we have enough food and other resources to take care of us?
world population density map
world features thematic maps
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October 12 1999: The World Population Hits 6 Billion
The world's population hit 6 billion people on this day in October of 1999. Read about the historic day in which the world's population hit the 6 billion mark.
