You seem to be saying that countries which pollute more simply because they are larger should do more than smaller countries (which may pollute more per capita but overall have less effect simply because of their size).
So Canada for example can pollute as much as it wants because its population is a tiny fraction of China's.
The flaw in that argument is that small countries together add up to a substantial percentage of the world population.
I haven't noticed any post suggesting that ANY country should be allowed or encouraged to pollute "as much as it wants".
If we wish to continue the self-flagellation, then, yes, we should reduce our carbon emissions so that they are negative, to atone for our past sins, but, if the objective is to limit or even reverse Climate Change, surely the first strategies to apply are:
- tackle the "low hanging fruit"
- go for the old 80/20 approach and attempt to make significant inroads into the 80%. That does not mean ignoring the 20%, although it may be difficult for men, it is, usually, quite possible to undertake more than one task simultaneously