I'm not a atmospheric scientist, nor am I like most you trolls that pretend that you actually have any clue what you are talking about, when I don't know.
As for your usual 'busy work' troll, I am not going to research this shit tonight because it is meaningless. If you are such a cuck that you still believe the lies that have been shown to have been pushed by the heavy polluting industries so much after they have been exposed in some lame ass attempt to 'own the libs', that is on you.
Less pollution is necessary, more trees and plant life to scrub the shit we have pumped into the atmosphere is also necessary. Any trolling spam saying otherwise is disingenuous.
Edit:
That being said, my guess it would be some extremely complex differential equation that would have several variables representing the many differences across our planet. And pretending that some magic number is actually representative of a 'ideal' is the same kind of magic thinking that allows trolls like yourself to keep your scams going on the people you conned into believing your lies.