What is your carbon footprint? A friend of ours tipped us off to Zero Footprint, and we were curious to see where we stood in terms of CO2 emissions. By entering the make and model of your car, how far you drive, how many flights you take in a year, and what your monthly gas and electric bills are, you can see how many tonnes of C02 your actions contribute to the environment. You can also compare your score to the national average. posted originally from: AT:Hometech Unfortunately, flying for business is a pretty common thing for us and admittedly contributes the greatest levels of C02 compared to vehicle and home sources such as electricity and gas consumption. This definitely makes the concept of the 100 mile diet look that much more appealing.