https://en.m.wikipedia.org/wiki/Mount_Nyiragongo
Mr. Mercat and I watched a documentary about this volcano. They said it produces more CO2 than all other sources in the world put together.
Seems it may be melting ice. Like duh....
This has long been a thought of mine. Mankind could, with much sacrifice, reduce its CO2 for a decade, only to have it all rendered moot by one belching volcano.