US, China agree to co-operate on climate crisis with urgency by Hyung-Jin Kim, The Associated Press Posted Apr 17, 2021 9:32 pm EDT Last Updated Apr 17, 2021 at 9:44 pm EDT FILE - In this March 10, 2021, file photo, United States Special Presidential Envoy for Climate John Kerry gestures as he speaks to the media after a meeting with French President Emmanuel Macron at the Elysee Palace in Paris. Kerry is in talks in China on Thursday, April 15, 2021 ahead of President Joe Biden’s climate summit of world leaders. (AP Photo/Michel Euler, File) SEOUL, Korea, Republic Of — The United States and China, the world’s two biggest carbon polluters, have agreed to co-operate with other countries to curb climate change, just days before President Joe Biden hosts a virtual summit of world leaders to discuss the issue.