My copy of the leaked final draft of the world’s most influential global warming report, despite authors of the highest reputation, reads like something from a mental hospital with no doctors or nurses.

The 31-page “Summary for Policymakers” of the United Nations Intergovernmental Panel on Climate Change announced the authors’ stunning concession that computer-modeled forecasts of imminent planetary catastrophe were catastrophically wrong – global surface temperatures haven’t risen significantly in the last 15 years – but, even with many other doubts, also insisted that the IPCC is more confident than ever that global warming is mainly humans’ fault.