Interesting POV, Gnu. Thanks for the comments. I'm just not sure, myself, that global warming is as real as it's being touted in many quarters (primarily the mainstream media and the tree huggers). No doubt about pollution, all I have to do is look at the brown cloud that generally hangs over the city of Phoenix, but I'm not sure that has anything to do with global warming. It just fouls up the air.

dougr