A few facts to add to a suspiciously fact-free Globe-alist "world reaction," especially in light of the deceptive graph on emissions per country in recent Globe/AP articles:
-China emits more than double the CO2 the US does. In 2015, China emitted 10,642 Mt of CO2, and the US 5,172 Mt. China emits more than 30% of worldwide CO2.
-according to the Paris agreement, China is not obligated to start reducing emissions until 2030 or later. China has a huge trade surplus (i.e. competitive advantage) w.r.t. the US and most other countries, on account of their manufacturing, powered mostly by coal, and Paris would increase this advantage.
-sea levels are set to increase by 2-3 feet by 2100 (not 30 feet "in the near future" as Al Gore claimed), and even if the US after pulling out of the treaty made no adjustments, this would make a difference of literally an inch or two by 2100. Of course, there will be adjustments thanks to improved efficiency, technology, more renewable energy, etc.