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Food/Fuel: Fueling Machines (1x29)

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True fuel is discussed in this episode, first with the 1980 phenomenon "gasohol" and with real gasoline at a motorcycle race. The gasohol segment takes Lisa to a rural factory where corn kernels, with enzymes and yeast, are fermented into alcohol to be mixed with gas. Lisa and the farmer then use it to drive a tractor. The Bloodhound Gang is confronted with "The Case of the Dead Man's Pigeon."