Finding Fuel Economy: Visit this Web Site, from the U.S. Department of Energy, Energy Efficiency and Renewable Energy, to find and compare fuel-efficient cars and trucks, learn about hybrid vehicles and get fuel economy tips.

Pew Center on Global Climate Change: State level Actions with a searchable database of information regarding the Transportation Sector:  Vehicle GHG Emissions Standards and  Mandates and Incentives Promoting Biofuels.

Biofuels for Transportation: A Climate Perspective (PDF):   June 2008. This 25 page white page from the Pew Center on Global Climate Change authored by Naomi Pena summarizes the current state of biofuels.

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