Photos: Turning green into gold

U.S. waterways are nowhere near as clean as the clear water in this fish tank. The founders of Klean Marine, based in Sunrise, Fla., hope that their start-up will change that by launching national cleaning services for recreational boats. Fees starting at $250 per year would help boat owners dispose of sewage and other waste, which too often get dumped in the dead of night, said company President Kean Fulton.

Photo by Corinne Schulze/CNET