Traveling on a fuel-gobbling airplane on Earth Day?

Don’t worry – you can still be green on the ground at many airports.

Boston Logan International Airport is reminding travelers that is has added GobiCab, a fuel-saving, taxi cab ride-sharing app (for iPhones) to the eco-friendly transportation options listed on its website.

BWI Thurgood Marshall Airport is celebrating by christening eight new electric car charging stations.

Wichita Mid-Continent and several other airports will be holding earth day fairs at their terminals

San Francisco International Airport is having a little Twitter contest.

If you tweet to @flySFO between 8 a.m. PDT and 8 p.m. PDT with ideas on how to reduce your environmental foot print when traveling, you may win one of the recycled SFO banner luggage tags they’re giving away.

And Chicago’s O’Hare International Airport kicks off its First Annual Garden Show on Friday, with displays from four area organizations: Openlands, Trees That Feed Foundation, The Conservation Foundation and the Chicago Botanic Garden.  Look for the green beyond the security checkpoints in Terminal 3, between concourses H/K and L through May 13.

(Flower photos courtesy Robin Carlson, Chicago Botanic Garden)