In the interests of impartiality, I am posting a link to Google Videos for a little-known CBC documentary that casts some doubt on the claim that global warming is caused by human industrial activity. It’s an interesting perspective, and does raise some valid points, but we do need to be clear on one thing: The scientists at the center of this documentary, Willie Soon and Sallie Baliunas, both work for the George C. Marshall Institute, which a right-wing think tank that gets a large percentage of its funding from big business interests, funneled through the Republican Party. In the past, the George C. Marshall Institute has lobbied congress (with the intention of delaying or halting regulation) to create the impression that tobacco is not carcinogenic, that second-hand smoke is not a health risk, and that CFCs don’t deplete the ozone layer. Nowadays, of course, only an idiot would try to back those claims. I don’t think either of these scientists qualify as unbiased. Video is about 45 minutes long.