That doesn't sound like it relates to the conversation of AGW.
But hopefully in your chemistry classes you DID learn that CO2 absorbs IR photons. And presumably you also learned that energy doesn't just "disappear". We know CO2 is a greenhouse gas. We know how it works. We even know how excess CO2 re-equilibrates back out of the atmosphere.
All of that points to it being a significant factor (not the only one) in AGW.
Your oversimplification and flawed math notwithstanding. Those back-of-the-envelope calcs don't hold any water in this system.
The only reason you know about the earth's changing climate in its distant past is because of the same work and same scientists who tell you that the current warming CANNOT be explained solely by natural forcings.
And yet again you spew opinion. How about gifting us with some of your own words. Talk about a geologic process you find interesting.
Use YOUR words, not cut and paste.