
The second IPCC report, in 1996, showed a 1,000-year graph demonstrating that temperature in the Middle Ages was warmer than today.
The 2001 report contained a new graph showing no medieval warm period. The technique they overweighed was one which the UN’s 1996 report had said was unsafe: measurement of tree-rings from bristlecone pines.
Scores of scientific papers show that the medieval warm period was real, global and up to 3C warmer than now.
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