China–US climate collaboration concerns as Xie and Kerry retire

John Kerry and Xie Zhenhua’s friendship kept US–China climate negotiations rolling even when the two countries disagreed on other matters.Credit: Fadel Dawod/Getty Researchers are regarding the parallel retirements of the US and Chinese climate envoys with apprehension, saying that the change could rattle the current co-operative spirit between the world’s two biggest carbon emitters. John … Read more