Reuters: World leaders led by President-elect Barack Obama may be needed to help agree even a modest U.N. climate treaty in 2009 after a rift deepened between rich and poor nations over funds and new goals to cut emissions. About 190 nations aim to work out a new treaty by mid-December 2009 but two weeks of preparatory talks in Poland ended on Saturday with developing nations accusing the rich of doing too little to help them cope with impacts such as droughts, floods, disease and rising …