Greenest cars

The American Council for an Energy-Efficient Economy's 10th annual "Greenest Cars" list includes only vehicles from Asian manufacturers. "When you look at the specs that matter, it's fair to say the imports have Detroit's number," said ACEEE analyst James Kliesch.

By Peter Valdes-Dapena, CNNMoney.com staff writer
Hyundai Elantra
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Hyundai Elantra
Engine: 2.0-liter 4-cylinder
Transmission: 4-speed automatic
Fuel: Gasoline
City mpg: 28
Highway mpg: 36
Green score: 45
The Elantra is a compact competitor to cars like the Toyota Corolla and Honda Civic. It's also available with a 5-speed manual transmission, but the fuel economy is the same.

Civic GX
Prius
Civic Hybrid
Altima Hybrid
Toyota Yaris
Corolla
Camry Hybrid
Fit
Rio
Accent
Elantra
Civic
About the list
Greener choices
ACEEE's "Green Score" is based on tailpipe emissions as well as pollution created in manufacturing the vehicle. Pollution from manufacturing is estimated based on the vehicle's weight. The average vehicle's "Green Score" is 30.

Disposal of hybrid batteries does not pose an environmental issue, said James Kliesch. Research Associate for ACEEE.

"It's generally agreed that batteres in [non plug-in] hybrids are going to last the life of the vehicle," he said

When the vehicle is eventually disposed of, the battery will almost certainly be recycled because of the high value of the nickel it contains, he said.

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Most stock quote data provided by BATS. Market indices are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer. Morningstar: © 2018 Morningstar, Inc. All Rights Reserved. Factset: FactSet Research Systems Inc. 2018. All rights reserved. Chicago Mercantile Association: Certain market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. Dow Jones: The Dow Jones branded indices are proprietary to and are calculated, distributed and marketed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC and have been licensed for use to S&P Opco, LLC and CNN. Standard & Poor's and S&P are registered trademarks of Standard & Poor's Financial Services LLC and Dow Jones is a registered trademark of Dow Jones Trademark Holdings LLC. All content of the Dow Jones branded indices © S&P Dow Jones Indices LLC 2018 and/or its affiliates.