And then....you go off on things that 'may' effect temps....without any correlation, or proof.
Too complex?
Too complex?
The campfires probably added to the cooling effect.
Of course the population was exponentially different.
We now have trillions of people all burning non-neutral carbon sources.
Whatever. We can just put up a synthetic solar shade by injecting particulates in to jet airline exhaust.
https://www.smithsonianmag.com/scie...creating-accidental-geoengineering-180957561/
Humans have NO EFFECT!![]()