A 2013 report by the I.P.C.C. reaffirmed that finding and concluded: “Recent long-term droughts in western North America cannot definitively be shown to lie outside the very large envelope of natural precipitation variability in this region…’
A 2013 report by the I.P.C.C. reaffirmed that finding and concluded: “Recent long-term droughts in western North America cannot definitively be shown to lie outside the very large envelope of natural precipitation variability in this region…’
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