Grist: Coal power plants are the biggest source of toxic water pollution in the U.S., mainly via coal combustion waste, which is the ash and sludge left over after burning the coal and filtering the exhaust (to keep the pollutants out of the air). Combustion waste contains heavy metals like lead and mercury that never degrade - they just "bioaccumulate" up the food chain until they reach us, doing untold damage along the way.
This week, a coalition of green groups released a report [PDF] about water...