I have a segment from a 'News Hour With Jim Leherer' (sp?) on video tape that deals with the issue of global warming. I don't know the date, because I didn't tape the beginning of the show, but it aired some time in the last couple of weeks. The segment addresses some of the issues that have been brought up on this thread and the previous one. I'm going to transcribe the relevant parts and post them. This is going to take me a little while, so I will probably post them later tonight or tomorrow.