Environmentalists view those proposals with skepticism and say negotiators in Bali will approach the Bush administration as an opponent they will have to reckon with for only 13 more months. "They are aware the U.S. is going to field a different team in the second half of these negotiations than in the first half," says David Doniger of the Natural Resources Defense Council. But with the United Nations aiming for a deal by the end of 2009, time is short. "In Bali, let us not point fingers or apportion blame," U.N. Secretary General Ban Ki-moon said recently. "Let us find common ground." But that's a place that's proved hard to locate, even under the same warming sky.