Well, my Bike to Work Week is complete, having ridden 4 out of 5 work days, covering 158.8 miles total just from my commuting. I figure I saved 9.9 gallons of gas not having driven my truck those 4 days. That is 9.9 gallons of gas not burned which means 188.6 lbs of carbon dioxide not released into the air.
I'd like to personally prevent releasing a ton of CO2 into the atmosphere this year by commuting which will mean 44 more days of riding my bike to work. That's a little over 1700 miles, which, added to my current 1218 miles accumulated since Jan. 1 will pretty much meet my goal of 3000 miles for the year. That doesn't include other rides in the evenings or on weekends, since I'm not substituting miles driven. So, if I can prevent releasing a ton of CO2 into the air from commuting alone this year, I will very easily smash my goal of 3000 miles for 2009.
I've already ridden to work several times this year, but no more than twice in one week. I won't count those trips. My next goal is commuting 5 days in one week. That won't happen for at least two weeks, since next week is only a 3 day week for me. Alex and I are going to Wisconsin to go biking on some of the rail-trails there next Friday and Saturday.