Beneath Bolivia's Salt Flats: Lithium Wealth

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The U.S. Geological Survey estimates that 5.4 million tons of lithium could possibly be found beneath the Salar de Uyuni. By way of comparison, it is estimated that the second largest deposit, in Chile, could yield 3 million tons. The U.S. only possess approximately 410,000 tons.

• Rescuing Chile's Trapped Miners