This earth was made to sustain itself at a constant level for us to inhabit. Redrgauless of the amount of people pollution, fires, trees removed and many other things, after all these variables the atmosphere is still stable at approx 80% nitrogen 20% oxygen and a few inert gases. Oh D. Cheney and Rumsfeld have been walking this earth for 1000 years. I saw a photo of those two with Nixon in the oval office in ’72 and they looked exactly like they do now and they were doing the same evil.