Conceding that the U.S. desperately needs a liquid-fuel replacement for crude oil in the near future, a Cornell University ecologist says ethanol and biodiesel are not the answer. “There is just no energy benefit to using plant biomass for liquid fuel,” says Cornell's David Pimentel. “These strategies are not sustainable.” Pimentel and Tad W. Patzek, professor of civil and environmental engineering at the University of California-Berkeley, recently published a report in Natural Resources ...

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