Global warming’ not unique

The find­ings [a review of lit­er­a­ture by Har­vard researchers] prove that the world expe­ri­enced a Medieval Warm Peri­od between the ninth and 14th cen­turies with glob­al tem­per­a­tures sig­nif­i­cant­ly high­er even than today. ”

The Unit­ed Nation’s Inter­gov­ern­men­tal Pan­el on Cli­mate Change (IPCC), how­ev­er, says that the Medieval Warm Peri­od does not estab­lish a ‘counter case’ since there is no evi­dence that the phe­nom­e­non was glob­al, like the present warm­ing. The study is to be pub­lished in the jour­nal Ener­gy & Envi­ron­ment

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