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Rising levels of atmospheric CO2 do not necessarily cause global warming.

Earth’s climate record shows that warming has preceded, not followed, a rise in CO2. According to a study published in Science, measurements of ice core samples showed that over the last four climactic cycles (past 240,000 years), periods of natural global warming preceded global increases in CO2. [117] The Proceedings of the National Academy of Sciences published a study of the earth’s climate 460-445 million years ago which found that an intense period of glaciation, not warming, occurred when CO2 levels were 5 times higher than they are today. [4] According to ecologist and former Director of Greenpeace International Patrick Moore, PhD, “there is some correlation, but little evidence, to support a direct causal relationship between CO2 and global temperature through the millennia.” [60]

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