Can you substantiate your thesis a bit? I.e. explain where the CO2 that the nature is (allegedly) producing is coming from?
For humans, it's pretty simple: we're burning the oil on the timescale of centuries that the nature has been storing on the timescale of billions of years. For nature, the longest CO2 cycle is at most a multiple of the longest life-span (~500 years), and there's no indication that the cycle has changed (i.e. that suddenly more trees are burning in natural fires than have for the past few millenia).
"While CO2 emissions come from a variety of natural sources, human-related emissions are responsible for the increase that has occurred in the atmosphere since the industrial revolution."
If those numbers are accurate, humans contribute 0.2% of CO2 and 60% of methane. So my follow up is: Which gas is a worse contributor? Because we can greatly influence one of those.
But "source" of CO2 is meaningless without the other column, "absorbtion". Obviously nature produces CO2 (e.g. by animals and plants breathing), and CO2 isn't a problem by itself. The problem is the increase of CO2, i.e. the delta between production and absorbtion. That 0.2% of human CO2 surplus turns into 20% increase over a 100 years. That's the problem, not the production/absorbtion/cycling of CO2 itself. And that part, AFAIK, is all human-made!
For humans, it's pretty simple: we're burning the oil on the timescale of centuries that the nature has been storing on the timescale of billions of years. For nature, the longest CO2 cycle is at most a multiple of the longest life-span (~500 years), and there's no indication that the cycle has changed (i.e. that suddenly more trees are burning in natural fires than have for the past few millenia).