Beyond corn, the new frontier in ethanol is nonfood biofuel

Star Tribune: The first large ethanol plants to produce biofuel from nonfood sources like corn cobs are starting operations in the Midwest amid industry worries that they might also be the last -- at least in the United States. After a decade of research and development, ethanol maker Poet Inc. and its Dutch partner Royal DSM recently produced the first cellulosic ethanol at a $275 million plant next to a cornfield in this northern Iowa town. Two other companies are completing new cellulosic ethanol plants......

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