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In northwest China, GRACE revealed

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a rapid decrease in freshwater storage without an obvious cause.

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Scientists knew that mountain glaciers were melting, but the melt-water did not

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leave the region, so they looked for another explanation.

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As it turns out, much of the region’s surface water is redirected

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to agricultural areas and the desert to the south, where it evaporates

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leaving the region with a net loss of water.

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