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I'd like to jump into this discussion again once our resident scientists here have determined whether or not global warming is actually happening.  Wake me up after that's settled.  Then, we can begin discussing whether or not the earth is in trouble, whether or not humans effect warming, whether or not there's anything that should be done, what the effects would be, and what it might cost.  Leftists want to jump directly from a questionable premise to the spending of trillions of dollars...... I'd rather wait until we know what the hell we're doing and why.