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Those prone to optimism hail the outcome in Durban as a long-overdue breakthrough for the torturous UN climate talks.

In Depth: Was Durban a climate breakthrough or disaster?

Those prone to optimism hail the outcome in Durban as a long-overdue breakthrough for the torturous UN climate talks.

Those prone to optimism hail the outcome in Durban as a long-overdue breakthrough for the torturous UN climate talks.