U.S. climate envoy John Kerry was in China for a visit from July 16 to 19. This visit, aiming at reviving climate cooperation between the world's top greenhouse gas emitters, came at an especially apt time with waves of extreme weather across the planet. How can China-U.S. cooperation better address climate change? Do Kerry's trip to Beijing and the surprise visit of the former U.S. Secretary of State Henry Kissinger at the age of 100, herald healthier and more sustainable bilateral relations?