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Contribution of Working Group I to the Fourth Assessment Report of the
Intergovernmental Panel on Climate Change

This Summary for Policymakers was formally approved at the 10th Session
of Working Group I of the IPCC, Paris, February 2007.

Summary for Policymakers (PDF)

The ‘Guidance Notes for Lead Authors of the IPCC Fourth Assessment Report on Addressing Uncertainties’ helps to convert uncertainties into probabilities
(Very likely > 90% probability, …)

more info at IPCC webpage