Agence France-Presse: A Danish draft proposal for a political agreement "threatens the success" of UN climate talks in Copenhagen, the head of the G77 group of countries said Tuesday at the summit aimed at sealing a historic deal on cutting carbon emissions. The text, which has not been officially released, is a "serious violation that threatens the success of the Copenhagen negotiating process," said Sudan’s Lumumba Stanislas Dia Ping, who heads the G77 group. "The G77 members will not walk out of …