If we add an additional 20 percent emissions cut by China by 2030, that adds 0.2 degrees; and another 0.2 degrees if we assume a 30 percent emissions cut by the rest of the industrialized world, by 2030. If we assume also a 20 percent reduction by the less-developed world by 2030, temperatures would be reduced by another one-tenth of a degree.
Fallacy: impossible expectations