Reuters: Air pollution is blotting out a tenth of China’s sunlight and a similar amount in India, a leading U.S. climate scientist said on Wednesday. The soot, called black carbon and produced by burning coal, dung, wood and diesel, rises in the upper atmosphere, where it traps the sun’s heat and blots out the light, raising the temperature at higher altitudes but cooling the earth below. Veerabhadran Ramanathan, an atmospheric scientist at the University of California, said that as a …