This story is a supplement to the feature "Facing the Freshwater Crisis" which was printed in the August 2008 issue of Scientific American.
Pressure from Climate and Population Growth
Models examining the effects of climate change and of population and economic growth on water availability by 2025 indicate that climate change alone will bring scarcity to many places (top). Population growth, however, is even more dangerous. In the absence of concerted action to save water, the combination of population growth and climate change (bottom) will create scarcity far and wide.