Agence France-Presse: When the history of climate change is written, 2007 will deserve a chapter all to itself. In just 12 months, global warming has been elevated to the great challenge of our time, a cause for public and celebrities alike, a Nobel-winning issue and a headache for politicians of every rank. In a vast report, the United Nations’s Intergovernmental Panel on Climate Change (IPCC) issued its grimmest scientific assessment yet. Its prose lacked varnish, was riddled with jargon impenetrable to …