GWU law professor Arnold Reitze, one of the nation's leading experts on environmental law, has an essay in The Environmental Forum arguing that the political scramble to address energy security and environmental pollution from automobiles has led to an unsustainable and unwise fixation on ethanol. The renewable content mandate for gasoline is all about subsidizing corn farmers, not developing desirable alternative energy sources. Reitze's paper now available in SSRN here, and it's worth a look.