Oh wait, you denier idiots think that since it was hot before that this sudden warming is no big deal, or not caused by man. Like I said, barely formed thoughts.. About what I would expect from right wingers.
So it's true. You think that because it was hot before and not caused by man that this time it is no problem and not caused by man. What difference does it make what happened before? Now it is being caused by man, it is a much more sudden rise than before, and it is a very serious problem facing the future of man. But for academic reasons.....https://en.wikipedia.org/wiki/Paleoclimatology And yes, in the past, much of the temp rise was due to CO2 rise. See, CO2 is a greenhouse gas. Do you know what that is?