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Originally Posted by Ace_O_Spades
And to say that humans have had no impact on global climate change is one of the most ridiculous things I've ever heard.
It makes me fear for the future of the planet if people don't realize that we ARE hurting the environment....
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But if this is true, how did the concentrations of atmospheric
carbon dioxide reach 400 parts per million (ppm) 420, 000 years ago then?
