Campaign strategist James Carville coined the phrase
"It's the economy, stupid" to focus the attention of campaign workers on the
one key issue that would get Bill Clinton elected president in the 1992 U.S.
election. Alas, the authors of the Fifth Assessment of the Intergovernmental
Panel on Climate Change (IPCC), published on Friday, have no such sage for
guidance. They'll have to make do with me.