This talk (about 85 min) by Prof. Steven Schneider (of the IPCC) is titled "Climate Change: Is the Science Settled Enough for Action?" That turned out to be a bit of a trick — the talk is actually more of an exploration of what "settled enough" would mean, and why we need to be acting.
It’s a little slow in spots, but it picks up towards the end, and he really shines during the Q&A. There’s something in here for almost all the regular Gristies who post or comment about the subject, and an interesting response on the "mitigation vs. adaptation" question.
