My phrasing may have sounded like the “humans aren’t the problem” climate deniers, but my point was that our amounts are only a percentage of the natural ebb and flow of CO2. The problem is that our addition was enough to tip the scales and cause an initial slow climb that has gotten faster and faster, and our percentage (which has itself magnified in the past few decades) is still a part of an increase from other natural sources that would have stayed dormant had we not started the process. Human activity was the catalyst of the reaction, and usually a catalyst amount required isn’t large.