Across the west, early miners digging for gold, silver and copper had no idea that one day something else very valuable would be buried in the piles of dirt and rocks they tossed aside. there's a rush in the u.s. to find key components of cellphones, televisions, weapons systems, wind turbines, mri machines and the regenerative brakes in hybrid cars, and old mine tailings piles just might be the answer.
posted: 7/21/2013 3:57 PM
Gold rush-era discards could fuel cellphones, TVs
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