Climate change isn't driven by human defined borders either. It's driven by total CO2 emissions. If a per-capita rate is non sensical then border based emissions are even more non sensical. Greenland only emits 0.001% of the total. Greenland is 12000x a better country than the US wow. This is exactly why per-capita is used.
And no policy is gonna willingly reduce energy consumption which is directly co-related with QOL when other countries have much higher per-capita consumption. Politically humans need fairness.
Yeah and this is clearest when you consider federations. Imagine if you count the US as 50 separate countries, suddenly they are much more climate friendly! That's of course absurd.
