TerraPass is an organization which balances out the pollution you cause when you drive a car or fly in a plane. For example, tell them how much you drive and they will calculate how much eco-friendly energy needs to be sponsored somewhere else in order to balance it out. You buy a pass that covers you for a year. The pass is really cheap. I got one for my car and for each time I get on a plane.

Go to www.terrapass.com/friends and use the word FRIENDS at checkout to get 10% off.