i partially agree with you on the topic of global warming...only due to things i have studied such as follows.
the earth has reoccurring weather patterns (such as the ice age), where the amount of CO2 in the air changes drastically due to things such as the freezing of water(and melting), the death/prevalence of photosynthetic plants, etc. Personally i believe that the cycle of constantly increasing CO2 levels would occur if we were here or not, but what i think is the most relevant with this topic is how us, as a society, has exponentially increased not only the volume of c02 that is created, but also the rate at which it is produced. (even though technically it already existed, but was bound to other elements yielding it as some other relevant/irrelevant molecule.)
global warming has happened for millions of years, we have just kicked it in the ass to make it hurry up much quicker than originally thought possible.