It used to be that there was no way around it - if you were traveling, then you'd be contributing to carbon dioxide emissions and the general funkification of the environment. But thanks to increased awareness, there are now lots of options for offsetting the negative environmental effects of travel, as well as a plethora of great tips for reducing your trip's carbon footprint (and saving money in the process).
This article from body + soul includes lots of helpful ideas for creating an eco-friendly road trip. We were especially pleased with the link to the Better World Club, which is like AAA but with a much more environmentally-friendly lean. The article also includes lots of fuel economy tips, as well as ways to make your trip more green once you get to where you're going. And don't forget public transportation! It's not mentioned, but of course that can be the most fuel-efficient option of them all.