I am, I admit.
Call me crazy, but I firmly believe that carbon will recycle endlessly in the earth's atmosphere, oceans and rocks, without ever reaching a point where the recycling feedback loop that has operated without a hitch for the last 4.5 billion years or so will be overwhelmed and send the atmosphere into an unstoppable warmup.
If the planet made it through the Cretaceous without doing so (when CO2 levels were many factors higher than today, and there were no ice caps), it surely will make it through today's conditions.
Am I going to hell now ?
You're hopeless. Not even the re-education center will help you.