Green Hands USA: America Volunteers

For the eighth year in a row, the natural gas-powered Honda Civic GX has been named the greenest car in America by the American Council for an Energy-Efficient Economy (ACEEE), which runs the GreenerCars website.

The rest of the top 13 greenest cars were a mix of all-electric vehicles, gas-powered cars and hybrids.

Second place went to the all-electric Nissan Leaf, while third on the list was the gas-powered Smart Fortwo.

The Toyota Prius, Honda Civic and Honda Insight -- all hybrids -- took the next three slots, followed by the Ford Fiesta SFE (Super Fuel Economy) and Chevrolet Cruze Eco.

The last car in the top 13 was the Chevy Volt.

“We’re seeing an increasing number of highly efficient gasoline options from both foreign and domestic automakers along with the first electric vehicles," said ACEEE vehicle analyst Shruti Vaidyanathan. "Ford introduced the Fiesta this year and Chevrolet debuted the Cruze, both of which do exceedingly well in our ratings."

ACEEE also publishes an annual list of the "meanest" vehicles -- those that are the worst for the environment. Cars and trucks on that list include two Mercedes-Benz models, the Ford Raptor, and the GMC Yukon.

For full information on these and other vehicles, visit GreenerCars.org.