Hate to be another to point this out but: does it matter at this point? Even if we turned off the USA, China and India would still tip us far past 400ppm by 205

Hate to be another to point this out but: does it matter at this point? Even if we turned off the USA, China and India would still tip us far past 400ppm by 2050. Those two, as well as most of the developing world, seem to have zero interest in doing anything whatsoever about CO2. The entire movement to curb CO2 seems exclusively American and European, with a small amount of participation from Japan.