Use these new MPG estimates to compare to 2008 and later model year vehicles. Click to Compare Old and New MPG.
Carbon footprint measures a vehicle’s impact on climate change in tons of carbon dioxide (CO2) emitted annually. The scale under each rating shows how the vehicle’s CO2 emissions compare to other vehicles. Click to learn more.
The Air Pollution score and Carbon Footprint measure different types of vehicle emissions. Air pollutants harm human health and/or cause smog. Carbon Footprint measures greenhouse gas emissions (primarily CO2) that impact climate change.
The EPA air pollution score rates cars and light trucks based on how much smog-forming air pollution they emit. Greenhouse gas emissions which may contribute to climate change are not included. Click for more info.

2002 Chevrolet Blazer 2WD
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Carbon Footprint
(tons/yr of CO2) Info
Air Pollution
ScoreInfo
All states except
CA and NE states
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Estimated
New MPG
  city  hwy
Chevrolet Blazer 2WD 6 cyl, 4.3 L, Automatic 4-spd, Regular
Chevrolet Blazer 2WD
10.8
 score = 01
15
city		20
hwy
$2346
 Chevrolet Blazer 2WD 6 cyl, 4.3 L, Manual 5-spd, Regular
Chevrolet Blazer 2WD
11.4
 score = 01
14
city		20
hwy
$2494
 

* Based on 45% highway driving, 55% city driving, 15000 annual miles and the price of fuel used by the vehicle. You may personalize these values to reflect the price of fuel in your area and your own driving patterns.

The carbon footprint measures greenhouse gas emissions expressed in CO2 equivalents. The estimates presented here are "full fuel-cycle estimates" and include the three major greenhouse gases emitted by motor vehicles: carbon dioxide, nitrous oxide, and methane. Full fuel-cycle estimates consider all steps in the use of a fuel, from production and refining to distribution and final use. Vehicle manufacture is excluded. (U.S. Department of Energy, GREET Model 1.7, Argonne National Laboratory)