edX Course on Global Warming Science

This looks like a good course for anyone who wants to learn the basic science of global warming. It's a step beyond the course Michael Mann taught a few years ago; this one requires knowledge of calculus, mechanics and electromagnetism -- that is to say, college freshman physics. It's taught by Kerry Emanuel (et al) of MIT, and consists of video lectures. It's free to audit. If you haven't wanted to read a climate science textbook but want to go beyond the zeroth-order energy balance equation, this looks like a good opportunity.