Reuters: A U.N. summit in Cancun, Mexico, at the end of the year will not result in a new climate treaty to succeed the Kyoto Protocol, the co-head of the European Union’s climate delegation said in an interview on Tuesday. “It will not be the big deal. Hopefully it will be a big step forward to the deal,” Artur Runge-Metzger told Reuters. The Kyoto Protocol was agreed in 1997 to reduce greenhouse gases emitted by developed countries to at least 5 percent below 1990 levels by …