This article, for instance, was not nearly so persuasive as the special I saw on the History Channel TM last night; "Global Warning?" And by persuasive I mean persuasive in the direction opposite of that which was intended. There was so much self-contradiction in it that I had to turn it off. But not before I saw the part that really scares me; some of the plans to get the global temperature to "come back down."
Climate researchers, acting on the conclusion that man is accidentally warming up the planet, are working on ways to deliberately cool it down. What if they succeed?! This sort of uneducated geusswork sometimes yields a correct answer, so what if they're wrong about the temperature rising, but right about a method to lower it? They could trigger a new ice age, and we all get to suffer from their mistake.