US and China pledge to resume climate working group, ramp up renewables ahead of Biden-Xi summit

​ The United States and China have agreed to resume a working group on climate cooperation and pledged a major ramp-up of renewable energy, the two sides announced Wednesday ahead of a leaders’ summit in San Francisco, as the world’s two largest polluters seek to overcome their geopolitical tensions to tackle the climate crisis. Read More Breaking News, Latest News and Videos | CNN