Role of clean energy

In chapter 6, Joseph Romm uses "personal researching" in page 196 and it at second paragraph where he talked about him working in U.S Department of Energy. Also he speak about publishing some case studies based on limiting energy consumption and carbon dioxide. However, before that case, he published another cased called, " "Greening the Building and the bottom line: Increasing productively Through Energy Efficient Design", but this case was dismissed.