[runarberg]

Interesting. Although there weren’t many humans around during the Carnian, so the volcanoes are gonna win that for sure.

Also there was a lot of old biomass waiting to be burned back then that exaggerated the CO2 emissions of the super volcanoes, as wood (and other novel carbon structures) evolved before organisms that could brake them down and allow it to rot. I’m not sure a super volcano today would release so much CO2 into the atmosphere as they did back in the late Permian / early Carnian simply because it won’t hit as much stored carbon pockets.

That said. These mega-colossal volcanic eruptions only happen like once every 50,000 years and emit an order of 10-100s of billions of CO2, which is only 1-5 of years of human CO2 emissions at the current rate.

Yes volcanoes do emit greenhouse gasses, but it is not nearly on the same scale as humans.