By Helen Regan and Carlotta Dotto, CNN
Graphics by Natalie Croker, Marco Chacon and Henrik Pettersson, CNN
Updated 1208 GMT (2008 HKT) October 29, 2021
(CNN)China and the United States are the world’s two biggest greenhouse gas emitters, so any attempt to address the climate crisis will need to involve deep emissions cuts from these two powerhouse nations.
