Agence France-Presse: India’s chief climate negotiator Shyam Saran played down Friday the chances of sealing a new UN treaty on global warming at next month’s crunch climate conference in Copenhagen. "It’s difficult to sound optimistic on the basis of where we have reached so far," Saran said, citing a lack of progress at high-level talks in Barcelona last week aimed at agreeing a negotiation blueprint for the December 7-18 summit in the Danish capital. "There are some very important issues that …