In his opening presentation to the Heartland Institute's climate change quibblefest, the ever-unreliable Dr. S. Fred Singer says, "Let's conclude that greenhouse gases are not responsible for global warming."
Oh yes, let's.
Of course, according to form, Singer offers no proof to support this conclusion. He claims in a passing reference that he and a couple of other (more credible) authors have recently published a journal article that categorically dismisses the role of CO2 in global warming. But that article, which Singer has been misrepresenting  for months, does no such thing.
Which brings us back to the same problem with always have with Fred Singer: the man is a liar. He takes money from the tobacco industry and the energy industry and then denies it . He makes up "facts " and then tries to blame others for having done so. And when we point out that he is a corporate-funded fraud, he complains  that we are avoiding a discussion of science in favor of hurling ad hominem attacks.
Objectively, there is little evidence that Fred Singer is in the science business. He appears to maintain a tiny science sideline on which he can continue to support his main gig, which is consulting for every think tank in America that denies the science of global warming. Fred Singer is an activist, a PR guy who refuses even to acknowledge that's his main job.
As we have said before, you would think that reputable scientists would be embarrassed to be seen with him. But then, we leave it to you to judge the reputation of the other "experts " participating in the climate skeptics conference.