Mark Jacobson director of the Atmosphere/Energy Program at Stanford University published a study that appears in today's online edition of Environmental Science & Technology, a publication of the American Chemical Society. Here
"Ethanol is being promoted as a clean and renewable fuel that will reduce global warming and air pollution...But our results show that a high blend of ethanol poses an equal or greater risk to public health than gasoline, which already causes significant health damage." from S.F. Gate
"The Tier-4 combinations (cellulosic- and corn-E85) were ranked lowest overall and with respect to climate, air pollution, land use, wildlife damage, and chemical waste. Cellulosic-E85 ranked lower than corn-E85 overall, primarily due to its potentially larger land footprint based on new data and its higher upstream air pollution emissions than corn-E85. See http://gristmill.grist.org/story/2008/12/12/22530/864
Wind with electric vehicles ranked first.