The River Runs Through US

"Sixty years ago, the Ohio was so glutted with hops, coal ash, pig innards, steel waste, and chemical poisons that it actually stank. Today, the river faces subtler - though perhaps no less serious - threats: runoff from cattle farms and agricultural areas, overflows of raw sewage, and the invasion of an insidious new species.This summer, a group of scientists from four local colleges set out to navigate the river's 981 miles, to test the scope of its problems and consider how - even whether - it can survive the challenges threatening many of the nation's waterways."

Thanks to Chris Steins