Agence France-Presse: Asia-Pacific leaders will drop a fixed target for halving greenhouse gas emissions in a final summit statement, a Chinese official said Saturday. "On the 50 percent reduction target (from 1990 levels) by 2050, yes, it did appear in the draft," said Yi Xianliang, a Chinese foreign ministry official who is part of the country’s negotiating team at world climate talks. "However, it is a very controversial issue in the world community… if we put it in this (final) statement, I …