Study Reaffirms Medieval Global Warming

You always hear about the middle ages being a warm time period, but exactly how warm were they? 

Listen to guest speaker Craig Idso while he discusses this topic.
"Scientific Studies have shown that temperatures were significantly warmer about a thousand years ago. Carbon dioxide concentrations in the atmosphere did not cause that warming and evidence suggests temperatures of the current warm period have nothing to do with the modern rise in CO2. There is absolutely nothing unusual, unnatural or unprecedented about Earth's current climate."
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