Forty US mines are causing water pollution that will last for centuries

The report by the mining watchdog group Earthworks, reveals that an estimated 17 to 27 billion gallons of polluted water will be generated by 40 existing hardrock mines (e.g. gold, copper, uranium mines) in the US each year, every year, in perpetuity. It says water treatment for these mines will cost as much as $67 billion per year (read more).