Sure, I basically agree that condemning is pointless and am not interested in condemning anyone. That’s not what climate science is about. I guess that’s maybe more what happens in the political spheres? Idk

Just regarding the 5-10% accuracy thing (and without meaning to nitpick, just explaining what assumption I’m making from what you said); I guess you meant more than 5-10% accuracy because if you’re yet to find data with less than 5-10% accuracy that means you’ve only found data that’s more accurate than that.

If you’ve not found data that’s more accurate than 5-10% you might want to check again. The CO2 analyzer that was installed at Mauna Loa (an active volcano) uses a technique called Cavity Ring-Down Spectroscopy (CRDS). (Prior to this, an analyzer was used based on infrared absorption). CDRS I think is about 99% accurate and infrared absorption I am not too certain of but I’m sure it’s more than 5-10%.

They measure the amount of CO2 in the atmosphere. It doesn’t really matter if it’s coming from humans or not (incidentally, some of it is, but that’s irrelevant). The point is that we know the effect of more CO2 in the system is that the planet warms, and having modelled that we understand that’s going to cause problems for us. There’s things we can do about it like carbon capture and switching from fossil fuels. Which is cool.