I've heard that in Brazil, by growing sugar cane, they get 7 units of ethanol energy for every unit of energy that goes into the process. In the U.S., by growing corn, the output is 1.3-1.4 for every unit that goes in. I would expect that similar metrics apply to other ag. fuels in grown temperate climates.
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- mark 4-21-2006 10:28 pm