Guardian: I have spent this week in Stockholm, going through the laborious but fascinating process of approving the Summary for Policymakers of the IPCC [Intergovernmental Panel on Climate Change] Working Group I report, the most comprehensive scientific assessment of climate change written to date.
The report is science meets policy. I'm on the science side. With my 259 colleagues, we spent three years writing this report, went through two rounds of reviews, considered nearly 55,000 comments, and wrote...