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Planet money had an episode about this: https://www.npr.org/sections/money/2018/07/13/628894815/episode-853-peak-sand https://www.npr.org/sections/money/2018/07

Planet money had an episode about this: https://www.npr.org/sections/money/2018/07/13/628894815/episode-853-peak-sand https://www.npr.org/sections/money/2018/07/13/628894815/epis...

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