Guardian: International climate talks are at risk of becoming irrelevant if countries fail to substantially narrow their differences before the end of this year, a senior European diplomat warned today. The grim prognosis by Artur Runge-Metzger, director of the climate policy division in the European commission, came at the opening of a six-day conference in China aimed at refining possible areas of agreement before crunch UN talks in Cancún in November-December. “If Cancún does not …