Top Six Greenest Cars in the U.S.

#1: Honda Civic GX

Mileage: 24 city, 36 hwy, per gallon-equivalent

Emissions are a major factor in the American Council for an Energy Efficient Economy's "Green Car" rankings, which the group has published annually since 1998. That's why the Civic GX tops the list despite fuel economy figures that are lower than the others. It runs on compressed natural, which is much cleaner burning than gasoline.

Emissions are why you won't find any diesel-powered cars on this list. Despite being very efficient, and much cleaner than they were in the past, diesel engines still emit more pollution than the most fuel-efficient gasoline cars.

#2: Nissan Leaf

Mileage: 106 city, 92 hwy, per gallon equivalent

EV rage: 100 miles

The Leaf burns no fuel at all, running purely on electricity. Electric power plants do burn fuel, and that's a factor taken into account in the ACEEE rankings. That's why the Leaf ranks second to the clean-burning Honda Civic GX.

#3: Smart ForTwo

Mileage: 33 city, 41 hwy

The ForTwo, a two-seat car, relies on small size, light weight and a tiny three cylinder engine to get a great "Green Score." Besides contributing the car's fuel efficiency, weight itself was a big factor in the ACEEE's scoring. The assumption is that heavier cars create more waste and emissions in their manufacturing and disposal than lighter cars.

#4: Toyota Prius

Mileage: 51 city, 48 hwy

Hybrid cars rank highly based on fuel economy, but they pay a penalty because of their heavy battery packs. Cars that use nickel-metal batteries, as the Prius does, pay a higher penalty in the rankings because their batteries contain more toxic substances than do the lithium-ion batteries used in most plug-in cars.

#5: Honda Civic Hybrid

Mileage: 40 city, 43 hwy

Because its hybrid system operates differently from that in a Prius, the Civic Hybrid is more efficient in highway driving than in the city. It's also less efficient overall.

#6: Honda Insight

Mileage: 40 city, 43 hwy

Honda launched the Insight as a less costly competitor to the Prius. Despite being a smaller car, its fuel economy is the same as the Civic Hybrid.

Eight Red Hot Fuel Saving Small Cars

Gas prices are up and so are small car sales. Here are 8 Red Hot tiny rides that should absolutely be on your shopping list.

By Peter Valdes-Dapena, senior writer


Volkswagen Golf
Price: $17,995 - $23,885
Mileage: 23 City / 33 Hwy

The Golf still offers that German car driving feel and interior quality that VW's are famous for. Even the base version is fun to drive.

While the Golf is great, critics complain that the new Jetta misses the mark. They say Volkswagen is stripping out all that makes VW's great in pursuit of lower prices. Luckily that philosophy hasn't hit the Golf, yet. (By the way... The new Jetta's selling well so, for better or worse, the low-price strategy's working.

Ford Focus
Price: $16,270 - $22,765
Mileage: 28 City / 38 Hwy
Just hitting the market now, Ford's new Focus is a huge change from the outgoing version.

The Focus has long been just an OK car, but the new Focus feels all wound up and ready to rock.The suspension is firmer, the steering is tighter, the engine's stronger and transmission is quicker.Its technology package, is amped up, too. This new Focus has so much tech that there are literally buttons on its buttons. In fact, some may say Ford's gone a little overboard this time.


Chevolet Cruze
Price: $16,525 - $22,225
Mileage: 26 City / 36 Hwy

With the Cruze, GM is clearly targeting those who want a mid-size car but don't want to pay for it. Both inside and out, the Cruze feels bigger than it is.On the road, it feels laid back and comfortable, not quick and twitchy. The Cruze does offer good performance and cornering, though they're just not the car's highlights.


Hyundai Elantra
Price: $14,945 - $20,195
Mileage: 29 City / 40 Hwy

The new Elantra's already making a big impression, having been named the named the Top Pick in its category by Consumer Reports magazine.

The Elantra has a richly appointed and nicely designed interior that wouldn't look out of place in a luxury car. It's also fun to drive but not overly aggressive.The Elantra's successful makeover has contributed to an almost 75% increase in sales for the model so far this year, according to data from Edmunds.com.


Honda Fit
The Fit has become a stand-by in the subcompact segment with its good performance and its roomy and very flexible interior space. With rear seats that fold in a few different ways, the Fit almost makes compact SUVs unnecessary.


Mazda Mazda3
Price: $15,100 - $16,860
Mileage: 27 City / 33 Hwy

The Mazda3 is surprisingly comfortable and roomy while still being fun to drive. It offers a nice package of technology options. In an ever more competitive market, newer models threaten to overtake even this excellent small car but it remains one you've got to consider.


Ford Fiesta
Price: $13,320 - $17,520
Mileage: 28 City / 37 Hwy

The Fiesta's a cool-looking, fuel efficient and fun little car. It's high-tech transmission—the same sort of twin-clutch six speed found in the larger Focus—helps provide the Fiesta's feeling of responsiveness.It's not the roomiest car you can get in this class, though, and its entertainment controls can be a little confusing.


Mini Cooper
Price: $19,400 - $24,850
Mileage: 29 City / 37 Hwy

While most cars try to feel roomier than they are, the Mini makes a point of its teeniness with high door sills and small windows. But it's all designed to make you feel so very cool and it works.The Mini is also quick, super-responsive and great on gas.

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