Associated Press: Industrial countries are falling short on pledging to slash their carbon emissions over the next decade, the U.N. climate chief said Wednesday, while the chief U.S. delegate urged climate negotiators to adopt a more long-term strategy. The contrasting visions of the fight against global warming emerged in the first appearance of the U.S. delegation sent by President Barack Obama, which nonetheless was warmly welcomed at a two-week negotiating session attended by 175 …