Much of US Could See a Water Shortage

Much of US Could See a Water Shortage:

Californians use nearly 23 trillion gallons of water a year, much of it coming from Sierra Nevada snowmelt. But climate change is producing less snowpack and causing it to melt prematurely, jeopardizing future supplies.

Experts also say the Colorado River, which provides freshwater to seven Western states, will probably provide less water in coming years as global warming shrinks its flow.