We've known how to construct highly efficient buildings for a long time. But new communications technologies, better materials and stronger market pull are making sustainable design far more prevalent.

Is it enough to permanently and radically change our building stock?

This week, the Gang is live from the Building Energy Summit in Washington, D.C. In this episode, we talk with some leading thinkers and practitioners in sustainable design about how our built environment is evolving. Listen to our conversation with John Picard, Roger Frechette and Darlene Pope about the future of buildings.

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The Energy Gang is produced by Greentechmedia.com. The show features weekly discussion between energy futurist Jigar Shah, energy policy expert Katherine Hamilton and Greentech Media Editor Stephen Lacey.