You fail to mention that for most of Earths history the climate was extremely unstable, huge temperature shifts over just a few years.
That's what I meant by "Things are delicate,".......climate is very complicated.
We can say for certain that the CO2 levels are going up and that rise is caused by humans.
We can say for certain that CO2 traps heat in the atmosphere, we've know that for 100+ years now.
We can say for certain that CO2 can account for a maximum of about 5C of average temp and we currently have about 3C worth.
We can say for certain that the ph of the oceans is driven mainly by dissolved CO2 and that is driven by temp and concentration in the air.
What that means though is explained mainly by the political religion you subscribe to. The left says the world is ending unless we act now!....which is ridiculous. The right says even the data is shit..... which is just plain ignorant.
The global climate is extremely complex and to date NO ONE has a model that passes even basic attempts at validation like can the model predict today given the data from 50 or 20 or even 10 years ago?...No, they can't.
The UN report did something I can't for the life of me understand and that is average the answers to the various computer models....this BTW also does not validate and is equivalent to grading a math test by surveying the room to see what everyone got then saying the right answer much be an average of that which simply makes no sense at all and tells me politics clouded logic.
Climate's not just climate either, its a collection of micro climates and the microcomputers are driven by all sorts of local factors. The big player tend to be stuff like clearing forest to farm, what crops are planted, what animals are brought in, how much hardscape, etc.
Is CO2 one of them? probably not much.
Does 1-2C matter? not normally but in some place it can.
Climate is delicate and extremely complex.
I read an article the other day about GMOs (genetically modified organisms) where th politics are reversed. On that issue the left is embracing rumor and flat out denying the basic science while the right has embraced the science and accepted GMOs for what they are....a tool to solve a problem.