The drought is very bad already. But the acutely parched American West and Central Plains don't yet know what a truly epochal drought is -- the kind worthy of a chapter in Earth's natural history.
원문출처 : http://edition.cnn.com/2015/02/14/us/nasa-study-western-megadrought/index.html?eref=edition
원문출처 : http://edition.cnn.com/2015/02/14/us/nasa-study-western-megadrought/index.html?eref=edition