[U]Starting tomorrow[/U] (after being announced only last Monday, I now find out):

"Science of Climate Change" on Coursera
[url]https://www.coursera.org/course/globalwarming[/url]

More explanation plus samples of graphics from the course:
[url]http://www.skepticalscience.com/Science-Climate-Change-online-class-Coursera.html[/url]