National Public Radio: While the U.S. and China have long been blamed for slowing progress toward a global treaty to slow global warming, Beijing is showing signs of softening its stance. Together the two countries produce about half of the world’s harmful emission. Nearly 190 nations on Thursday entered final-hour talks on the Indonesian island of Bali, hoping to launching negotiations for a successor to the Kyoto Protocol. But European nations threatened to boycott U.S.-led climate talks next month …