Korea Herald: The government is pushing to introduce a cap-and-trade system for carbon dioxide as early as next year. But the plan faces lingering divisions among policymakers and businesses, and the uncertain future of a new global treaty to fight greenhouse gas emissions. The trading mechanism is a key instrument for Korea’s goal of reducing greenhouse gas emissions by 30 percent below “business-as-usual’ levels until 2020. The voluntary target was set late last year as part of President Lee Myung-bak’s low-carbon,…