Reuters: Rifts opened Friday at the first U.N. climate meeting since the acrimonious Copenhagen summit about how to revive U.N. negotiations with few delegates predicting a breakthrough to combat global warming in 2010. Government negotiators at the 175-nation talks urged efforts to restore trust between rich and poor nations after the December summit in Copenhagen fell short of a full legal treaty. But none announced new concessions to help. Outside the conference center, …