>>Well, if you go back 250 million years, you see a CO2 rise as fast as >>it does now. One theory is that a megavolcano burying Siberia lit off >>a bunch of coal fields, and both the volcano and the coal fields sent >>the CO2 sky-high. >> >>Of course that event is commonly called "The Great Dying." > > Is there any evidence of the carbon monoxide >then, coal burning without excess oxygen can >result in 50% CO, and lots of black smoke.
[supporting evidence for the hypothesis]
I've never neen that speculation raised about the "great dying". Would CO be stable enough to cover the planet, or would it be mainly local to proto-Siberia? And would it affect plants, too? I think that the Great Dying despeciated plants as well as animals and fish. -- We are geeks. Resistance is voltage over current.