Orbiting Carbon Observatory crash sets back post-Kyoto emissions monitoring.Jeff Tollefson& Geoff BrumfielSome hoped the Orbiting Carbon Observatory would smooth the way for future emissions agreements after Kyoto.NASAThe climate community is counting the costs of losing NASA's Orbiting Carbon Observatory (OCO), which plummeted into the ocean during launch on 24 February.The satellite would have measured carbon dioxide concentrations in unprecedented detail, allowing scientists to track emission