New Scientist: IT COULD just be the breakthrough the world has been waiting for. After years of prevarication, China now reportedly wants to ensure its carbon dioxide emissions peak, perhaps as early as 2025 (see "China moots reaching emissions peak by 2025"). With US emissions also peaking, due largely to growing use of shale gas, the world's two biggest polluters may finally be committed to action action made even more timely by recent studies that have eliminated some of the scarier climate scenarios, creating...