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...