BBC: Scientists have assessed the scale of the epic California drought and say it will require more than 40 cubic km of water to return the US state to normal.
The figure was worked out by weighing the land from space.
The American West Coast has been hit by big storms in recent days, but this rainfall is only expected to make a small dent in California's problems.
Researchers described their research at the American Geophysical Union's Fall Meeting in San Francisco.
The US space agency (Nasa)......
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California’s water woes quantified
Posted by Washington Post: Juliet Eilperin on December 17th, 2014
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