How hot was it at that time and how did the sun cycles factor into that?
I believe the Global Warming crowd is claiming a runaway greenhouse effect that cannot be recovered.
IIRC the earth has been much warmer in the past, many millions of years ago. If that is true, and it appears to be true, then why wasn't the planet destroyed?
Remember, the "experts" are claiming an increase of five degrees or so on average will doom the planet.
Then why wasn't the planet destroyed when the average temperature was much warmer?
And they still haven't explained the warming period of about one thousand years ago when Greenland was a lot warmer and they cultivated grapes. They've tried to claim that that the warming only extended to Greenland. How the heck could the warming have only extended to Greenland? And how could the warming have lasted for 400 years before it cooled again?
A very large part of northern hemisphere must have been a lot warmer. Why aren't there any records of coastal cities in Europe being flooded from the warming?
The "experts" are hiding a lot of info that harms their agenda.