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Why a shrinking US aluminum industry is tricky news for clean energy

Once the world’s top aluminum producer, the U.S. is now making much less of it — just as cleantech industries drive up demand for the metal and advocates try to drive its emissions down.

By Maria Gallucci  . 

Two men in work gear and hard hats stand inside a factory
Workers at Century Aluminum Company's now-idled plant in Hawesville, Kentucky (Luke Sharrett/The Washington Post/Getty Images)