Human population growth may be the largest threat to earth ecosystems. We develop land for living space, business operations, government use, transportation, waste disposal, recreation, agriculture, energy production, and mining. We are also depleting wildlife for food and profit. Population growth is probably not sustainable at the current rate.


U.S. Census Bureau – U.S. and World Population Clock

Worldometers – World Population and by 20 Largest Countries

The World Counts – World Population and Resource Use

Select Articles:

Overpopulation: The Causes, Effects and Potential Solutions

Family Planning and Environmental Sustainability Assessment Aims to Shed Light on Pop-Environment Link

Worst Environmental Problem? Overpopulation, Experts Say

U.N. Study Ends Overpopulation Fears

Family Planning: A Major Environmental Emphasis