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Climate change is the single greatest threat to development – making the battle to overcome poverty ever harder and more expensive. Finance is urgently needed to help vulnerable communities adapt to a changing climate. Last year the World Bank estimated the costs of adaptation in poor countries were $75-100bn per year if global warming was kept to 2 C. The non-binding pledges from rich countries to cut emissions offered since Copenhagen would steer a course towards a catastrophic 4 C.

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