Voice of America: The U.N. Climate Change Conference in Bali ended Saturday with an agreement to begin negotiations for a new treaty on global warming. VOA’s Nancy-Amelia Collins, who covered the conference, reports from Jakarta that the agreement came after the United States fell into line at the last minute. After two days of nearly round-the-clock negotiations, the success of the U.N. conference hinged on one point: would the U.S. delegation agree to a proposal by the developing nation bloc, the …