You can look up various cars and see their fuel economy, carbon footprint and tons of interesting info. I REALLY like doing the "side by side comparison" and comparing my smart to the Ford Explorer Sport Trac I used to drive! It's like
making an additional $200/ mo- just based on MPG. Makes the monthly car payment not seem so bad after mentally deducting what I'm saving in gas purchases. Hey- if it makes me feel better....
Fuel Economy