Nikkei: Negotiations are gaining momentum toward a new treaty that would set post-2050 targets for reducing global greenhouse gas emissions, giving individual nations more time to bring their own short- and medium-term goals up to speed. Parties to a United Nations climate change framework aim to adopt a new global treaty at the 21st Conference of the Parties, or COP21, in Paris from Nov. 30 to Dec. 11. But countries are far from agreement on specific emissions targets. France, host of the conference,...