At the Paris climate accord, world leaders promised to keep the global temperature increase this century (relative to pre-industrial levels) "well below 2 ˚C" and if possible below 1.5 ˚C. Many experts are skeptical about this goal being feasible, stating that even if all Paris targets are met, global warming may reach levels up to 3 ˚C above pre-industrial levels. Furthermore, with the coming departure of the United States from the agreement, the meeting of global targets may be in jeopardy.