Voice of America: China, one of the world’s top polluters, has again said that developed nations should help it, and other developing economies, reduce greenhouse gas emissions. Chinese officials say they will have trouble cutting the country’s use of polluting coal without cash and technology from rich countries. Daniel Schearf reports from Beijing. Visitors walk through the polluted air at Beijing’s Tiananmen Square (File)A new policy paper released Wednesday repeats China’s stance that developed …