Greg Lindsay of Fast Company caught a speech by Calthorpe at the 18th Congress for the New Urbanism in Atlanta.
Lindsay writes, "Calthorpe has something even bigger in mind: bringing urbanism to bear on the debate about how best to combat climate change, using metrics and software that quantifies the savings in both CO2 and dollars from denser urbanism. "This policy debate is going forward without us," he said. "And I think it's very important we inject ourselves into it, because we have the best solution for climate change.""
See also Planetizen's coverage of CNU18 here.