U.S. climate analyst Roger Pielke writes at Forbes magazine: "The bottom line of this analysis should be undeniable: There is simply no evidence that the world is, or is on the brink of, making 'rapid, far-reaching and unprecedented changes in all aspects of society' that would be required for the deep decarbonization associated with a 1.5°C temperature target. Anyone advocating a 50% reduction in emissions by 2030 is engaging in a form of climate theater, full of drama but not much suspense. But don’t just take it from me, do the math yourself."