Comment by pfdietz
India has great incentive to control CO2 emission: killer heat waves in a somewhat warmer world. And China seems to be slashing their CO2 intensity without external prodding (coal use there seems to have peaked), and facilitating CO2 emission reduction elsewhere.
India already has massive incentives to be more effectively regulated than they are now in a dozen other areas. And yet, they remain India.
China is definitely more effectively regulated than at regulation once the cdentral gov’t steps in, but it only has a limited number of things it can step in on.