Colorado Mine Spill Aftermath: How to Clean a River

Colorado Mine Spill Aftermath: How to Clean a River,
August 12, 2015,
By Stephanie Pappas, Live Science Contributor,

An accidental breach by an EPA cleanup crew sent 3 million gallons of acidic, heavy-metal-laden water into Colorado's waterways. How do you clean up a river? The answer is twofold: treatment and dilution.