Least and Most Polluting Cars, 2013

The ACEEE's Green Book®, a buyer's guide to environmentally friendly passenger vehicles, rates cars according to their emissions and fuel consumption, and publishes an annual list of the "greenest" and "meanest" (i.e., most polluting).

Greenest vehicles	MPG: city¹	MPG: hwy.¹	Green² score
1. TOYOTA PRIUS C	53	46	58
2. HONDA FIT	3.9	3.1	57
3. TOYOTA PRIUS	51	48	55
4. TOYOTA PRIUS PLUG-IN HYBRID	51	49	55
5. HONDA CIVIC HYBRID	44	44	55
6. HONDA INSIGHT	41	44	54
7. VOLKSWAGEN JETTA HYBRID	42	48	53
8. MERCEDES-BENZ SMART FORTWO CONVERTIBLE / COUPE	34	38	53
9. SCION IQ	36	37	53
10. FORD FOCUS	3.3	2.9	52

Meanest vehicles	MPG: city	MPG: hwy.	Green² score
1. FORD F-350 FFV	11	16	17
2. FORD F-250 FFV	11	16	17
3. FORD E-350 WAGON	10	13	17
4. CHEVROLET G2500 EXPRESS	10	15	18
5. CHEVROLET SUBURBAN K2500 / GMC K2500 YUKON XL	10	15	19
6. BUGATT VEYRON	8	15	19
7. FORD E-150 WAGON FFV	12	16	21
8. MERCEDES-BENZ G63 AMG	12	14	21
9. BENTLEY MULSANNE	11	18	21
10. MERCEDES-BENZ G550	12	15	22

NOTE: MPG = miles per gallon. 1. Fuel economy for electric vehicles is provided in miles per kilowatt-hour. 2. The green score runs on a scale from 0 to 100. The top vehicle this year scored a 58, and the worst gas-guzzler scored 22. The score is based on automakers' test results for fuel economy and emissions as reported to the EPA, as well as an estimate of pollution from vehicle manufacturing, from the production and distribution of fuel, and from vehicle tailpipes. It also factors in air pollution. Source: Web: American Council for an Energy-Efficient Economy (ACEEE).

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