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.

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.