News special : Countdown to Copenhagen

With the UN climate change conference in Copenhagen less than four weeks away, Nature continues to track how much - or little - progress is being made on tackling climate change. The Barcelona summit – the final round of talks before Copenhagen – is now over. With a fully binding international treaty looking ever more unlikely to be signed before the end of the year, negotiators have tried to map out a path ahead. For more on the upcoming climate summit, see Nature's Road to Copenhagen special.

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