Martha and Helen decide to enter Wagstaff City's Go Green Go-Cart race. They do some research and visit the junkyard to find what they need to build a solar-powered cart. T.D. and Alice also visit the junkyard because they are making a wind-powered cart. Ronald and Reginald win the race with their cart "powered by a goldfish" but later they fight and crash into a post revealing that it is a lawnmower! T.D. and Alice are the real winners and Junkyard Joe gives them the trophy. Includes facts about renewable energy.