Global warming and drinking water

Mountain snows and alpine glaciers represent key reservoirs of fresh water for some 1.6 billion people worldwide. In 50 years, however, a warming planet is likely to disrupt many of these sources, leaving millions of people scrambling for additional supplies.

While conservation, additional reservoirs, and repairs to leaky water mains can help blunt the effects of these changes, efforts to adapt to shrinking snowpacks and vanishing glaciers are expected to require other changes in farming techniques, industrial practices, and lifestyles.