Architecture.

http://www.youtube.com/watch?v=gKtJynaQChQ&playnext=1&list=PL40F17FDC6E297F77&feature=results_main

Sustainable architecture, also called sustainable architecture, green architecture, eco-architecture and environmentally conscious architecture, is a way of conceiving the architectural design of a sustainable, seeking to optimize resources and systems of the building so as to minimize the environmental impact of buildings on the environment and its inhabitants.