From Copenhagen to Vancouver, we are surrounded by great examples of what smart green cities look like. That gives us hope. It also gives us a much-needed break from the depressing geo-political mire that bubbles to the surface with every new round of climate-change negotiations.
So far, though, successful responses to climate change have been confined to a relatively small group of celebrity cities. There are more than 1,000 large and mid-size cities in the world. Only a small fraction of them are taking effective action.