Roger Ebert throws up his hands in response to readers who took issue with his review of An Inconvenient Truth:

I cannot get into a scientific discussion here. There will be no end to it. All I can say is, the Gore documentary made a deep impression on me. I urge you to see it. You will not be seeing a "campaign film," or "sour grapes," or "Gore still being bitter." George W. Bush has repeated for six years that global warming "requires more study." If Gore has spent six years studying it, aren't his findings worthy of attention? Yes, I'm "being political." But saying the issue "needs more study" is a political statement when energy groups are among your major supporters and your family is in the oil business.  [full response]

Good point.