This is the fourth in a series of video podcasts for the PBS series e² design season two. Each podcast takes you beyond the episodes and deeper into the world of sustainable design. Biophilia is a hypothesis that describes humans as emotionally connected to all other living systems. Jonathan Rose, a New York City-based real estate developer, describes how biophilia can guide building design in dense urban environments. In many instances, biophilia shares the same principles as sustainable building design. Major corporate funding for the e² series is provided by Autodesk. More information is available at http://www.pbs.org/e2/ and http://www.e2-series.com/