Other than buying carbon offsets, what exactly do you suggest you should do if you are concerned about carbon footprints and your job wants to send you from point A to point B?
If you really care, don't go from point A to point B.
Frankly I don't care, I've been burning off corn fields this week ... 100's and 100's of acres up in flames. Hurricane Ike laid a lot of corn on the ground and the combine couldn't get it and the only way to kill it for winter wheat crops is to burn it off since it's Roundup Ready ... which means it's immune to RoundUp and ag herbicides will not kill it. I'd have fields of soybeans and corn in the same field next year ... not good.
So this week my carbon footprint is the size of a small country.