Population growth places more demands on groundwater resources.
Highly populated cities such as Mexico City, Bangkok, Manila,
Beijing, Madras and Shanghai, have relied on groundwater aquifers
for hundreds of years, however they are now experiencing serious
aquifer drops- in some cases between 10 to 50 meters.
More information:
Static maps for population density 1700,
1750, 1800,
1850, 1900,
1950, 1990
Flash controllable animation
