Urban retrofitting: creating different sorts of spaces and uses out of places that are already there.

Saying the Tech Bloom is not commercially driven is like saying Mother Teresa had an interest in the poor.

Cities generate most of the global economy, and most of its energy use, resource demands and climate emissions. How we build cities over the next decades will largely determine whether we can deliver a bright green future.

Copenhagen has done a remarkable job creating streets that are focused on bicycles and pedestrians.

Powerful people doing bad things LIKE cynical, despairing citizens.

There's no law of physics that says we have to be an unsustainable society - in fact, quite the opposite. The planet's ready to work with us if we're ready to think differently, but we do have to make that jump and start to do things in new ways.

You don't change the world by hiding in the woods, wearing a hair shirt, or buying indulgences in the form of 'Save the Earth' bumper stickers. You do it by articulating a vision for the future and pursuing it with all the ingenuity humanity can muster.