This report describes the rating system behind ACEEE’s Green Book® Online: The Environmental Guide to Cars and Trucks, and the model year 2004 vehicle scorings available online at GreenerCars.com. It discusses the background, life-cycle analysis considerations, and data sources, and explains the methodology used to arrive at a vehicle’s overall "Green Score." Detailed tables document the data, assumptions, and parameters applied in the rating system, including evaluations of new "Tier 2" and "LEV II" emission standards.
