The American Council for an Energy-Efficient Economy (ACEEE) has ranked the natural gas-burning Honda Civic GX as the greenest vehicle, for the second year. The battery-powered Nissan Leaf scored as high as the Civic GX on the green chart (click the image for full size), but the Honda took the first place on environmental items.
However, the Smart Fortwo Electric Drive is the greenest vehicle. According to the ACEEE, the Fortwo scored 60 (the Civic and the Leaf scored 54), but was not eligible for the greenest list due to low sales volume. Only 250 units of the 2011 Smart Fortwo EV will be available on a trial basis in the U.S., the ACEEE states.
The plug-in hybrid Chevrolet Volt ranked twelfth overall due to its comparatively poor fuel economy.
For more, visit the ACEEE website