Ethanol: The Complete Energy Life Cycle Picture (PDF) was prepared by the U.S. Department of Energy and describes how corn ethanol can reduce petroleum use and greenhouse gas emissions. (March 2007)


Reducing Greenhouse Gas Emissions from U.S. Transportation (PDF) is a report issued by the Pew Center on Global Climate Change. It describes opportunities that are available now and in the future to reduce emissions from the U.S. transportation sector, including by the rapid deployment of renewable fuels. (May 2003)