WorldChanging: Tools, Models and Ideas for Building a Bright Green Future: What do you no longer believe? What do you now believe?

WorldChanging: Tools, Models and Ideas for Building a Bright Green Future: What do you no longer believe? What do you now believe?: "What makes the 2007 sea-ice collapse so unnerving is that it happened too soon. The ensemble averages of our most sophisticated climate model predictions, put forth in the IPCC AR4 report and various other model intercomparison studies, don't predict a downwards lurch of that magnitude for another fifty years"