Reuters: The world’s biggest greenhouse gas producers have edged closer to agreement on a deal to fight global warming at crucial climate change talks in December, Canada’s Environment Minister Jim Prentice said on Thursday. Talks between the biggest economies, hosted last month by President Barack Obama in Washington, had helped to bridge gaps between countries ahead of the U.N. meeting in Copenhagen to find a successor to the Kyoto Protocol, he added. “I am quite hopeful, optimistic …