I make Anthropogenic Global Warming a major focus in my Analytical Reasoning classes. There are epistemic issues (how do we know it's happening?) as well as social/political/economic issue that help students sharpen their critical thinking skills. I show the Australian Broacasting Company film "Crude; the Story of Oil," a presentation by Naomi Oreskes countering Creighton's book "Climate of Fear," (www.ucsd.tv) as well as her essay "Climate Change; How Do We Know We're Not Wrong?" . I also show psychologist Daniel Gilbert's PopTech.org treatment of AGW denial.
Anyone else out there focusing on AGW/CC in their classes? What resources do you use and how do student's respond? I've found a lot of them changing their minds if they were ignorant of or in denial of the issue to begin with.