[jhanschoo]

> Humanity (as in the species of modern humans) has already lived through quite extreme changes in temperatures.

That's a disingenuous argument. I can regularly survive changes of temperature between 0 deg Celsius and 30 deg Celsius, but give me one between 30 deg Celsius and 60 deg Celsius and I'd die.

https://www.climate.gov/news-features/understanding-climate/...

Heating and cooling periods, true. CO2 in the atmosphere? Unprecedented. Why does the record above not go further back? Because that's the earliest we can reach with the ice core records. Scientists think that the earliest we've had comparable CO2 levels was the Middle Miocene. If we're going to have Middle Miocene again, we're going to have to go through a period of terrible food insecurity and societal collapse, alongside mass failure of many biospheres.

https://en.wikipedia.org/wiki/Middle_Miocene_disruption