redOrbit: The issue of who will provide funding to assist developing nations in reducing carbon emissions has emerged as a significant challenge during a five-day U.N. climate meeting concluding Friday in Bonn. The negotiations had many participants frustrated with the lack of progress just four months ahead of an upcoming U.N. conference in Copenhagen to agree upon a successor treaty to the Kyoto protocol, which expires in 2012. Some say the best that can be expected from the December …