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The World May Be Running Out Of Sand. Seriously. 9

A grain of sand may seem inconsequential. But these tiny specs are the building blocks for everything from roads to computers. Vince Beiser joins us to talk about the importance of sand as a natural resource – and about the very real possibility that we may be running out of it. His new book is called “The World in a Grain: The Story of Sand and How it Transformed Civilization” (Riverhead Books).