Associated Press: President Barack Obama’s visit to China next month is not likely to yield a separate accord on countering global warming, though both countries are pushing for progress for upcoming global talks in Copenhagen, the top U.S. envoy on climate change said Wednesday. "I don’t think we’re going to get an agreement per se," said Todd Stern, the U.S. special envoy for climate change. However, he said Obama will work with Chinese President Hu Jintao toward facilitating an agreement at the …