The Dirty Dozen

To borrow a page from the days of the oh-so-eco-friendly Pony Express, if cars were judged by their emissions alone, then these twelve dirty machines would have Wanted! written all over them. The law in this drawn-out analogy would be the folks at the American Council for an Energy-Efficient Economy (ACEEE), an independent Washington, D.C.-based non-profit that assigns ratings to cars based on fuel efficiency and emissions cleanliness. The council's upstanding citizens posting the highest scores include Nissan's electric Leaf and Honda's Civic GX, which top the list with 54 points each. Kudos to them. But we're here to look at a gang the green posse is after with freshly knotted ropes: