The Crichton piece is really quite well written; I have used it in some of my English rhetoric classes in the past.
I agree with Crichton that the consensus argument is used when the science isn't settled. And, yes, I remain skeptical about some aspects of climate change and all the political claptrap that is frequently lumped with it. But on the other hand, it's entirely reasonable to reduce our carbon emissions. And to say "I believe" recent climate change is not human-driven is just as spurious as claims that the science is settled. I think it's important to emphasize that the science isn't settled, but we still sometimes have to make judgment calls based on what we have thus far.
Thanks, Interbane for bringing up the Pope's encyclical. I started a new thread to discuss that.
http://www.booktalk.org/the-pope-s-ency ... 19815.html