Whether or not you believe it global warming caused by man, here are a couple web sites that put things in perspective.
http://www.junkscience.com/
http://www.climatedepot.com/

Additionally, Al Gore and others have claimed the scientific community agrees and the data is undisputed. NOT! 30,000 climatologist sent letters to the White House saying the scientists do not agree, and that by and large, global warming, and cooling, is nothing more than an anomaly created by sun spots. And, according to information on several websites the earth's average temperature has not increased on a decade.

Keep in mind that the planet cannot survive without carbon dioxide. The percentage of carbon dioxide in our atmosphere has been relatively stable for millions of years, and science revealed that the highest CO2 level historically was when dinosaurs roamed the planet.

Steve Milloy's book "Green Hell" should be mandatory reading for everyone. I purchased the book at Barnes & Noble, it cost me $28 and I read it cover to cover in just a few days. Since then I have loaned it to a half-dozen friends that sincerely believed global warming was caused by man--they've since changed their minds.

Cheers,

Gary