Veteran climate negotiators arriving at this week's talks in New York faced an uphill struggle. There has been little real progress since the failure of the 2009 talks in Copenhagen, and the Global Carbon Project's latest report suggested global emissions are consistent with the worst of four scenarios - threatening up to 5 ℃ of warming by 2100. Those on the People's Climate March in New York, and around the world, were both determined and sceptical. "You have to keep up hope, but I don't think things will change," said one. Their banners testified to the issue's complexity: no-nukes signs next to calls for zero-carbon power, "grandparents for climate action" next to signs deploring pension funds' fossil-fuel investments.
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