"If you want to know where the "global warming" fearmongers are coming from, follow the money."
So let me see - on one side of this debate we have the bulk of the scientific community and a bunch of well meaning hippes, and on the other we have the oil industry, the car industry, the airline industry, in fact pretty much all of industry, across the world, and you are trying to tell us that it is the warmists who we shouldn't trust because of their vested financial interests? I'm sorry, but I just don't buy it. I have little doubt that if a research group wanted to persue a more skeptical line they would have absolutely no problem finding funding for it.
It's absolutely fine to question the science, but attaching the motivation of the researchers, just because you don't like their results, makes it seem like you've run out of real arguments.