Reuters: Many nations are pushing for swift ratification of a Paris agreement to slow climate change and lock it in place for four years before a change in the White House next year that might bring a weakening of Washingtons long-term commitment. More than 130 nations with 60 leaders including French President Francois Hollande are due to sign Decembers pact at a U.N. ceremony in New York on April 22, the most ever for a U.N. agreement on an opening day, the United Nations said. Both China and the United...