Right now on TBS (8pm-10pm EST on November 20) there is a special for Global Warming and other environmental awareness featuring comedians, movie stars, music and more.

I saw a preview for it when I went to see Harry Potter...it's looked like it might be interesting. Tell me how it turned out okay?!?!

It was ok. It's rerunning again right now, 10pm-midnight. Some of the jokes were pretty funny, and most of the people seemed to be taking the issues seriously, but it also seemed like some of the people were just mocking the whole event in a "yeah, like this is going to do any good" way.