Top 10 Green Buildings, 2011

LOTT Clean Water Alliance, Olympia, Wash.
The Miller | Hull Partnership
Most people wouldn't picture a sewage-treatment plant as a green building, but the LOTT Clean Water Alliance Regional Service Center is different. It has been optimized to provide solar heat and introduce daylight to reduce lighting. Methane generated from the plant's waste-treatment process is used in a cogeneration plant to create electricity and heat. The heat is used directly in the building, thereby eliminating the need for a boiler.

• The Eco-Utopian Visions of Architect Vincent Callebaut