Wasn’t there a report someplace that said the CO2 out of one volcano was more that all of mankinds C02 output in the lifetime of men>
Mt. Pinatubo. P.I.
I’m waiting for Yellowstone to blow.
Not sure if this is the one your looking for but it says the same thing.
https://principia-scientific.com/a-volcano-eruption-can-emit-more-co2-than-all-humanity-why-worry/