Рет қаралды 595,012
Sand is used everywhere: from glass to asphalt, sand is a key ingredient for all sorts of materials in construction and technology. But this heavy reliance on sand means that we’re also reaching a limit on this seemingly infinite resource-and it's also in demand by... criminals? Learn more with Hank in this new episode of SciShow!
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The World Is Built on Sand... and We're Running Out