Study Sees Drought Trend in U.S. Southwest A study published in the journal Science predicts that America's Southwest will be plagued by extended droughts in the coming decades. The paper says the changes are likely to be permanent.
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Study Sees Drought Trend in U.S. Southwest

Study Sees Drought Trend in U.S. Southwest

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A study published in the journal Science predicts that America's Southwest will be plagued by extended droughts in the coming decades. One of paper's authors, Yochanan Kushnir, a research scientist at Columbia University's Lamont-Doherty Earth Observatory, talks with Alex Chadwick.