http://seattlepi.nwsource.com/business/292969_carbonoffsets20.htmlMy two worries about this are that some people (or even more importantly corporations) may use this as a way to never move from fossil fuels. They will think that as long as they give a 20 dollar donation to the local Sierra Club, or "say" they are investing in alternate energies (without still getting it to every pump in this country at a reasonable price) that they can feel guiltless about not doing anything else. I also worry about people getting involved in schemes... organizations set up to look environmental just to take advantage of this trend. I suggest if people really wish to do this that they do their homework first and only offset with reputable organizations, and don't stop working for alternate energy sources in the interim while they still conserve energy. I offset with a sustaining donorship to environmental organizations, but I also work to keep it down as low as possible. I do not think carbon neutrality should be seen as a "get out of jail free" card.