I came across this gem some time ago. And they wonder why people are getting pi$$ed off about being blamed for MMGW! No comment necessary except that they do not have a clue what the hell they are talking about. They use MODELLING because that really is all they can do with climate change. Problem is that they do not know enough about all our planetary and solar system impacts on the climate so how can they input all relevant variables into the most complex of models - that pertaining to climate change!!!!!
"The most distant period in time for which we have estimated CO2 levels is around the Ordovician period, 500 million years ago. At the time, atmospheric CO2 concentration was at a whopping 3000 to 9000 ppm! The average temperature wasn’t much more than 10 degrees C above today’s, and those of you who have heard of the runaway hothouse Earth scenario may wonder why it didn’t happen then. Major factors were that the Sun was cooler, and the planet’s orbital cycles were different."
