Global Warming and Energy

Antarctic evidence supports global Medieval Warm Period. Mann admits models cannot reproduce Medieval Warm Period.

"Ice core data shows CO2 levels changed less than 10 parts per million from 1600-1800 during the MWP.

From the Hockey Schtick:  A new paper from Schurer et al (with Mann as co-author) finds that climate “models cannot explain the warm conditions around 1000 [years before the present, during the Medieval Warming Period] seen in some [temperature] reconstructions.”"

Models can't reproduce modern climate history either.

Even NOAA admits the 2012 drought was a weather event, not caused by global warming.