An article from the financial times out of the UK talks about "Companies and individuals rushing to go green have been spending millions on carbon credit projects that yield few if any environmental benefits."
http://www.ft.com/cms/s/48e334ce-f35...b5df10621.html
We know there are some good companies out there really trying to do good things, but be careful which ones you give money to. I don't see
terrapass mentioned, so hopefully they are all right.