Interesting article regarding scientists tied to coal and oil, who denied any correlation to emissions and global warming, now admitting their actual findings were altered or suppressed so as to not hurt their employers. It appears the theory of this just being another natural change in earth's climate, just went out the window.
http://www.nytimes.com/2009/04/24/sc...24deny.html?hp

This is not to say that this will change anyone's mind.