Megacities: Scars On The Earth, Or Keys To Growth?
December 12, 2011 12:12:00 pm
Steve Inskeep, host of NPR's Morning Edition and author of Instant City
Robert Kunzig, senior environment editor, National Geographic Magazine
Critics have long derided the world's biggest cities as disorderly, overcrowded and polluted. But in recent years, as the planet's population continues to rise past seven billion and more and more people flock to urban areas, some now argue that cities may hold the key to sustainable growth.