Someone I knew email me this carbon footprint thingy and I gave it a try.
Calculate Your Carbone Footprint
Personally I think this thing is a joke. My wife and I have only one car between us, we drive less than 10,000 miles in a year, we recycle, keep our heat down to 66 degrees in the winter and have a useless swamp cooler in the summer. However it showed me as having a bigger carbon footprint than the country as a whole.
Considering how many people in this country drive SUV's and other gas guzzling vehicles and I we have a Focus because of the Gas Mileage, you would think that it would be the other way around.
Give it a try and see what you come up with.