Brown: '50 days to save world'

Gordon Brown has warned the UK faces a "catastrophe" of floods, droughts and killer heatwaves if world leaders fail to agree a deal on climate change.

He addressed the Major Economies Forum in London, which brings together 17 of the world's biggest greenhouse gas-emitting countries where he said there was "no plan B" if agreement was not reached at December's UN summit in Copenhagen.

Negotiators have 50 days to save the world from global warming, he added.