It's not just enough to survive. We've got to make something better than what we've got.

We have to craft new political realities, not only in places like India, Afghanistan, Kenya, Pakistan, but here at home as well. Another world is possible.

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

Cities offer us powerful leverage on our most stubborn, wasteful practices. Long commutes in our cars, big power bills from our energy-hogging buildings, shopping trips to buy stuff that'll spend a few short months in our homes and long centuries in our landfills.

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

Cabbies in particular seem to like discussing the fate the Earth.

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.