The SF chapter of the American Institute of Architects is blazing a trail with a series of free iTunes podcasts. The podcasts are part of this venerable design non-profit's mission to educate the public about architecture.
Check out the Sustainable Design episode, recorded in 2005, entitled "What It Is and Why It Matters." 2005 AIA San Francisco President J. Paul Bohn chats (in layman's terms) with Marc L'Italien, principal of EHDD Architecture, about trends in sustainable architecture, delving into "low-tech and affordable ways in which green building is simply a result of carefully planned design." The discussion ranges from low flush toilets to the green efficiencies of adobe architecture and the Monterey Bay Aquarium.