WASHINGTON, March 4: The world’s hopes for curbing climate change hinge on action by two giant nations whose relations are deteriorating: China and the United States. The two countries both say they are intent on retooling their economies to burn less climate-wrecking coal, oil and gas. But tensions between them threaten their ultimate success.

BEIJING, Feb 22: Senior Chinese diplomat Wang Yi said on Monday the United States and China could work together on issues like climate change and the coronavirus pandemic if they repaired their damaged bilateral relationship.