Originally posted by chuckChuck
					
						
						
							
							
							
							
								
								
								
								
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		This question is actually really easy to answer. Unlike many of the questions I ask you which "science" doesn't have an answer, we really do know the answer to this one.
So, since glaciers melting is caused by CO2, what year did they start melting? The year CO2 hit 400 ppm? 300? 250?
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