French diplomat signals climate 'breakthrough'

France's top climate negotiator said Tuesday there has been a "breakthrough" in 46-nation talks in Paris to pave the way for a world pact to beat back global warming. "This is a breakthrough," said Laurence Tubiana, at the close of the two-day ministerial meeting, pointing to a hard-won consensus on key points that have stymied negotiations ahead of a crucial UN conference at year's end. The United Nations has embraced a goal of capping global warming to two degrees