2007 Group Health Commute Challenge
CO₂ Saved By Biking

This report assumes an average of 20 miles per gallon. A gallon of gas weighs approximately 6.3 pounds which when burned produces roughly 20 pounds of CO₂, or roughly 1 pound CO₂ per mile given a 20mpg fuel efficiency.

For an explanation of how so many pounds of CO₂ can be produced per gallon of gasoline, check out this article: http://www.fueleconomy.gov/feg/co2.shtml

Total CO₂ saved this contest: 315313.4 pounds