Huffington Post: What are the U.N. Climate Chief's biggest concerns gearing up to the creation of the historic climate agreement on Friday? Aside from the challenge of coming up with ambitious yet realistic legally binding guidelines for carbon reductions, and the significant financial concerns associated, she's seriously concerned about sleep deprivation. U.N. Framework Convention on Climate Change Chief Christiana Figueres said that her big concern is that the negotiators getting enough rest and staying focused,...