Andrew David Thaler is a marine scientist by day. But by night, he works his magic with Google maps to show people what their cities will look like if climate change is left unchecked.
Harvard evolutionary biologist Daniel Lieberman says we're ill-adapted for the world we've made for ourselves.
With little or no leadership from above, Rob Hopkins, founder of the Transition Towns movement, says change has to start at the street level -- and he's seeing it happen.
The director of the NAACPs climate justice program talks about why the venerable civil rights organization has taken up the cause.
Mohamed Hage is breaking ground in urban ag, feeding cities from a high-tech hydroponic greenhouses on rooftops in Montreal.
The man who says gardening is his graffiti talks about fame, sex, and his diabolical plan to take over the world.
Landscape architect Kevin Shanley says human-made marshes can act as buffers against storm surges, but will they be enough to save us from the rising seas?
Most African Americans, Caribbean Americans, and African immigrants live in cities. That doesn’t mean they don’t have deep roots.
Bill Peduto says the Steel City is poised for a sustainable revival, thanks to a new generation of Pittsburghers who are pushing for change.