Looking to reduce your carbon footprint, save money or just contribute less to that nasty smog?
Well, this is your buying guide to the cleanest, most efficient cars on the market.
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| Vehicle | GW | SS |
| 2008 Mini MINI-E | 10 | 10 |
| 2010 Honda INSIGHT | 10 | 9 |
| 2010 Toyota PRIUS | 10 | 9 |
| 2010 Ford FUSION HYBRID | 9 | 9 |
| Vehicle | GW | SS |
| 2009 Honda CIVIC GX | 9 | 9 |
| 2010 Mercury MILAN HYBRID | 9 | 9 |
| 2009 Toyota CAMRY HYBRID | 9 | 9 |
View all| Vehicle | GW | SS |
| 2009 Saturn VUE HYBRID | 7 | 6 |
| 2009 Cadillac ESCALADE HYBRID 2WD/AWD | 5 | 4 |
| 2009 Chevy TAHOE HYBRID 2WD/4WD | 5 | 4 |
| 2009 GMC YUKON 1500 HYBRID 2WD/4WD | 5 | 4 |
| Vehicle | GW | SS |
| 2009 Honda CIVIC GX | 9 | 9 |
| 2009 Mercury MARINER 2WD/4WD HYBRID | 8 | 9 |
| 2009 Ford ESCAPE HYBRID 2WD/4WD | 8 | 9 |
| 2009 Mazda TRIBUTE 2WD/4WD HYBRID | 8 | 9 |
| Vehicle | GW | SS |
| 2009 Nissan ALTIMA HYBRID | 8 | 9 |
| 2009 Volkswagen JETTA TDI | 8 | 5 |
| 2009 BMW 335d | 7 | 4 |
| 2009 Mercedes-Benz ML 320 BLUETEC | 4 | 5 |