Associated Press: China’s top climate change negotiator is calling on the United States to take a more "positive" role in tackling the issue. The comments come on the heels of a worldwide agreement to forge a new climate treaty. The accord came at the end of a U.N. climate conference in Indonesia where the U.S. agreed to drop its opposition to offering more technological help to developing countries fighting climate change. The Chinese climate negotiator welcomes the move by the U.S. …