Greenpeace: Greenpeace today called on the United States to take the lead on climate action as the world’s largest emitters gathered in Mexico for the US-led Major Economies Forum. A banner reading ‘Save the Climate, Act Now!’ was unfurled in Cuernavaca City, where the meeting is being held, as the Forum opened. Leadership is urgently needed to achieve a climate saving treaty at Copenhagen in December. Environment ministers meeting in Mexico over the next two days are discussing the …