S3·E25 Regattadamerang

Ned has been made the coxswain of the Friendly Falls rowing team in a regatta against the neighboring town of Carty Garbageton, a filthy town founded by janitors and gas station attendants. Friendly Falls traditionally beats Carty Garbageton, by coming in second-last. Their "winning" streak is in trouble, though, when Friendly Falls loses all its money sponsoring a start-up company to sell smoke and soot from the town's old chimney factory. Many of the townspeople have to do menial work in Carty Garbageton to make the money back, but they're all fired when the town starts becoming clean. Ned then gets the idea to sell the soot to Carty Garbageton, and the town makes all its money back just in time for Friendly Falls to not come in last at the regatta.