You should have kept up with Dr. Teller:
Society's emissions of carbon dioxide may or may not turn out to have something significant to do with global warming--the jury is still out. As a scientist, I must stand silent on this issue until it's resolved scientifically. As a citizen, however, I can tell you that I'm entertained by the high political theater that the nation's politicians have engaged in over the last few months. It's wonderful to think that the world is so very wealthy that a single nation--America--can consider spending $100 billion or so each year to address a problem that may not exist--and that, if it does exist, certainly has unknown dimensions.
.......
Yet if the politics of global warming require that "something must be done" while we still don't know whether anything really needs to be done--let alone what exactly--let us play to our uniquely American strengths in innovation and technology to offset any global warming by the least costly means possible. While scientists continue research into any global climatic effects of greenhouse gases, we ought to study ways to offset any possible ill effects.
http://www.evolutionquebec.com/site/archives/teller.htm
Dr. Teller was also a signatory to the Global Warming Petition Project urging the United States government to reject the Kyoto Protocol, and states in part;
"There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse [gases] is causing or will, in the foreseeable future, cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate"
