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No one really understands the earths warming and cooling cycles. It may take 1,000s of years to completely prove anything. In the meantime, it seems that dumping poisons in the atmosphere and in our water is a bad idea, regardless. As a species, we really need to clean up our act, global warming or not. I can teach my dog not to crap where she lives, you'd think we could do the same with people.
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