Star Tribune: Corn ethanol is no better fuel than gasoline, and it may even be worse for air quality, according to a new University of Minnesota study. The study, released Monday, is the first one to estimate the economic costs to human health and well-being from three different fuels — gasoline, corn-based ethanol and cellulosic (plant-based) ethanol — its authors say. Scientists and economists looked at life-cycle emissions of growing, harvesting, producing and burning different fuels, …