If you can't cut down on polution at least feel better about it

There has been a push towards all things 'green' in the United States recently (although I'd love to see some statistics showing that people are practicing what they preach). There is a nifty service out there started by a couple business grad students called TerraPass. They sell TerraPasses that off set the emissions of your car, home and I think have branched out into new areas recently. You input the square footage of your home and the state or make and model of your car. They will tell you how much of a polluter you are each year and you can buy a pass which they will invest into clean energy or other good stuff that will negate your "carbon footprint" as they like to say.