This popular guide ranks all 2001 vehicles according to environmental friendliness. Buyers can compare cars, vans, pickups, and SUVs by their environmental impacts on air pollution and global warming and learn which vehicles are the Best of 2001, including the greenest and the meanest. The 2001 edition features: -- discussion of hybrid vehicle technology; -- review of Toyota's Prius, the greenest gasoline car; -- all-new index of vehicles.Plus Green Scores for all 2001 makes and model listed by class.The American Council for an Energy-Efficient Economy (ACEEE) is a nonprofit organization dedicated to advancing energy efficiency as a means of promoting both economic prosperity and environmental protection.