Source: South China Morning PostThe 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.China and the United States are the world’s No 1 and No 2 carbon polluters, respectively, pumping out nearly half of the fossil fuel fumes that are warming the planet’s…Read More