The earth doesnt produce carbon at all What?

There are hundreds of fully natural processes that emit carbon that have nothing to do with Humans. Volcanos, Plant Respiration, other mammal respiration, forest fires, lime stone erosion, natural decomposition of organic matter, meteorites burning up in the atomosphere, lightning strikes, etc etc. Where do you think the carbon in the earth came from? God? Well before humans existed there were ice ages and periods of higher carbon dioxide in the atmosphere, as well as higher oxygen. That statement by itself shows you don't' really have a good grasp of what climate change is, nor what is causing it.