Floating down the Otter Tail River on an inner tube is a popular summer pastime in Becker County in Northwestern Minnesota. Over the past 20 years "tubing " has grown from a kids summer pastime into a profitable business. But the profit has come at a price. Despite the efforts of outfitters to keep the river clean, pollution is a problem. Empty cans, broken bottles and other trash litter the stream bed and banks. It gets noisy too when tubers get a little rowdy. Now county Commissioners are considering a clampdown, and at least one outfitter is crying foul. Minnesota Public Radio's Bob Reha reports }