Silica sand is used for fracking. Pure silica is scarce in the oil fields. But it`s easy to find beneath the farms of Wisconsin. When the fracking craze started, corn fields turned into open pit mines. Then, when the price of oil dropped, mines started to close. What happens when a mining boom goes bust? Ken Notes: You need Amazon Prime or a few bucks to watch this but it is worth it - interesting film.... | ||
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