Today's inconvenient fact:----Scientists Skeptical of Anthropogenic Global Warming

Scientists Skeptical of Anthropogenic Global Warming--Gregory Wrightstone

"Today's inconvenient fact: 

There was a "consensus" opinion in the late 20th Century that previous warming periods dating back to the end of the last glacial advance were warmer than our current temps. 

This is from the UN IPCC First Assessment Report (FAR):
"A global warming of larger size has almost certainly occurred at least once since the end of the last glaciation without any appreciable increase in greenhouse gases. 

Because we do not understand the reasons for these past warming events, it is not yet possible to attribute a specific proportion of the recent, smaller warming to an increase of greenhouse gases."
The images below are from that report (redrawn for clarity)"

18

ts