HowStuffWorks "Maps of World Population Density"

world population density map
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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?

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.