@saskboy I was curious if this was true because 250 million years ago there was a planetary mass-extinction event that pumped 8x as much carbon dioxide into the air than there currently is now and killed 85% of life on Earth. It was called the Permian-Triassic Extinction.

I found this scientific paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351498/

What I found out was, we are currently pumping more carbon into the air than that mass-extinction event by a multiple of several hundred.