The earth has warmed and cooled many times over the billions of years we’ve been around.

Who’s “we”? The human species is somewhere around 200,000 years old.

I was a kid when Mt. Pinatubo put so much ash and CO2 into the air that it changed the weather in Minnesota, where I was growing up. Human CO2 emissions are 100 times what that eruption emitted - per year.