Terrapass.com has a carbon footprint calculator that allows you to see how much pollution you emit based on the car you drive and how you live. According to my input of 8,000 miles a year, it calculates I produce 7,826 lbs of CO2 per year. It would cost me $47 to offset those emissions.

The site provides information comparing the brick to other types of vehicles and average US mileage. Click here, or the graphic above to see the details.