COP27 showcases U.S.-China climate action rivalry

Biden's task: Restore U.S. credibility on climate action to counter China's courting of developing countries grappling with existential risks posed by a warming world. At the same time, he'll be working to restore some level of China-U.S. cooperation on climate, after Chinese President Xi Jinping suspended a bilateral effort following House Speaker Nancy Pelosi's trip to Taiwan in August. "There is no solution to the problem of climate change without China," White House climate envoy John Kerry said on Wednesday. "We stand ready to sit down with China on the climate issue and work together to solve what is not…