We speak with Richard Register about his 55-year career designing "ecocities" or ecologically healthy cities. The conversation covers these topics:

4:35- What is an ecocity?

5:44- 2D and 3D urban design

7:46- Why a city's shape matters

8:49- Ecocity design elements

11:14- Human-powered transportation

12:12- The city as a living organism

15:01- China's ecocities

17:32- Combining all the design elements

19:09- Co-housing

22:38- Retrofitting sprawled cities

24:25- Challenges to building ecocities

28:08- Deconstructing unsustainable cities

31:27- The sounds of a well-designed space

33:25- Nature-inspired urban design

36:06- Courage and maps