Here's why Niger's coup matters to the U.S.

A general view of billowing smoke as supporters of Niger’s defense and security forces attack the headquarters of the Nigerien Party for Democracy and Socialism, the party of overthrown President Mohamed Bazoum, in Niamey, Thursday. AFP via Getty Images hide caption toggle caption AFP via Getty Images A general view

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More than half of the world's largest lakes are shrinking. Here's why that matters

Water levels at Lake Powell, the nation’s second-largest reservoir, remain critically low because of a climate-change driven megadrought and overuse of the Colorado River’s water. Claire Harbage/NPR/NPR hide caption toggle caption Claire Harbage/NPR/NPR Water levels at Lake Powell, the nation’s second-largest reservoir, remain critically low because of a climate-change driven

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