Historically, there were Vikings living in Greenland, where they harvested hop for beer.
That is how hot it was.
They were not having nightmares, but parties.

http://www.realclimatescience.com - Tony Heller lists lot of proof how the numbers have been faked to make the temperatures seem higher, and the climate scarier. The temperature has been going up and down for ages, but only old people know it. In 1960 there were scientists warning about a new ice-age, caused by.. CO2.

A lot more information can be found on: /s/ClimateSkeptics