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Advocates demand halt to uranium mine near the Grand Canyon

Arizona has been banking groundwater for decades Experts urge caution about using it

The Colorado River has been in severe decline for years, in part, because a historic drought has reduced rainfall and snowpack. These are all factors above the river.However, the groundwater lurking beneath the Earth’s surface also plays a big role in the river’s levels. Groundwater can be stored for thousands of years, according to Fred Tillman, a research hydrologist with

USGS: A Century of Watching the Colorado River

USGS: A Century of Watching the Colorado River
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A Century of Watching the Colorado River

A Century of Watching the Colorado River
usgs.gov - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from usgs.gov Daily Mail and Mail on Sunday newspapers.

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