From my understanding, he's technically right: Al Gore doesn't get to choose where his energy comes from.
Those programs simply ensure that the amount of energy you purchased to be green will be sent through the sytem at some point to some one.
It also doesn't say how much money they spend in that program. You have to buy "blocks" of energy - they could buy one block for 4 bucks and say that they participate in the program.
Saw this article on RCP this morning, figured it was interesting enough to post and start a discussion on.
http://www.realclearpolitics.com/articles/...in_decline.html