Behind-the-Scenes Video: Bolivia Holds the Key to the Green Revolution
Beneath the Salar de Uyuni, the world's largest salt flats in a remote corner of South America's poorest nation, there's an untapped fortune below the white crust. Nearly half the world's lithium -- 5.4 million tons of it, according to the U.S. Geological Survey -- lies in the briny water...
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