Reuters: An agreement to fight global warming came one step closer to taking effect on Wednesday when dozens of countries deposited their ratification of the deal at the United Nations, taking the total to 60, U.N. Secretary-General Ban Ki-moon said. The deal, agreed by nearly 200 countries in Paris last December, needs ratification by at least 55 countries representing 55 percent of global carbon dioxide emissions to take effect. Ban said the 60 countries represented more than 47.5 percent. The United...