Page last updated at 14:34 GMT, Tuesday, 22 September 2009 15:34 UK

IPCC warns of temperature rise

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Dr Rajendra Pachauri, chairman of the UN Intergovernmental Panel on Climate Change, has spoken at a summit about the rise of global greenhouse gas emissions.

He said the average temperature by the end of this century could increase by up to 6.4 degrees Celsius.

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