Some passing thoughts:
1) Thomas Sowell is a brilliant man.
2) We are definitely going through some kind of warming. I know this because when I grew up in Springfield, MO, the small area lakes would freeze over, allowing ice skating. That doesn't happen anymore.
3) The earth has undergone many periods of warming and cooling. Like EVERYTHING, it goes in cycles. If someone can name the brand of SUV that caused the last ice-age to end, then I'll listen to the "man is causing it" BS.
4) CO2 is great for plants. They inhale it, then exhale oxygen. Just the opposite of us. It's almost like someone planned it that way!! (G-d, perhaps??)
5) Science has shown that with increases in carbon dioxide, plants actually increase in size and their ability to process it.
6) Science is also showing us that the sun is currently increasing in heat output. Thus, Mars is also experiencing (according to science) melting of ice caps. I wonder what brand of SUV is causing that??
7) The Kyoto treaty would exempt China, currently the biggest polluting nation on the planet.
8) The UN is proposing as a solution a global tax. I fail to see how confiscation of money from the "west" will cool the earth. (Even though, as we all know, the UN has a GREAT reputation for honesty and handling of money.

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9) Polar bears can swim a LOT of miles. The latest hoax about polar bears is a picture fraudulently offered as a couple "stranded" on an iceberg, never to be seen again. That picture was taken in 2004, and it depicts a couple of polar bears on the tip of an ice outcrop. If you look at that picture, those fuzzy bears don't look as much desperate as they do p*ssed, probably because they didn't find any seals to eat.
10) Despite denials of reality, the same "groups" who are telling us that unless we make drastic changes the earth is going to burn up were the same groups telling us 30 years ago that we were all going to become ice cubes.
11) Anyone who believes in this "carbon offset" crap is an imbecile. Al Gore owns a company that takes money from these imbeciles and tells them they are "carbon neutral". (I hear Bushie also started one of these companies, but I'm still skeptical...)
12) Algore is clearly insane. You can see it in his eyes. If you still have doubts, then just listen to him speak.