Mann, Hayhoe try to erase the Medieval warm period

By James Taylor | CFACT | October 1, 2019 Climate alarmists Michael Mann and Katharine Hayhoe have been caught using dubious, revisionist temperature data in their attempt, as one Climategate email author put it,  to “deal a mortal blow” to the extensively documented Medieval Warm Period. Before climate change became a political issue, it was […]

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