The denser places get, the lower the amount of energy people use to get around it.

I think we're going to start to see a new model of civic advocacy where people get together once in a while to protest, but it's more about an ongoing, sustained engagement in issues, networks and communities about which people care.

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.

The denser places get, the lower the amount of energy people use to get around it.

In almost all city governments in America, the small group of people who don't want change are able to block change.

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

By looking at climate change as a clean energy generation problem, we're setting ourselves up not to solve it.