James T. Caldwell, PhD, discussed China’s efforts to build 168 sustainable cities—Eco-Cities—with Michael Killen. The interview focuses on three cities—Tianjin, Suzhou and Nansha— in this country of 1.3 billion people, characteristics of an eco-city, and the government’s motivation to develop Green Specification Systems. Caldwell, CEO of E3Regenesis Solutions, also serves as the Director, US-China Green Energy Council, Green Building and Eco-City Task Force Less