"Sustainable design integrates consideration of resource and energy efficiency, healthy buildings and materials, ecologically and socially sensitive land-use, and an aesthetic sensitivity that inspires, affirms, and ennobles..." The construction process affects the environment and surrounding ecosystem. Once buildings are constructed, the occupants and administrators face a series of challenges in their attempt to maintain a healthy, efficient, and productive environment. In order to face these challenges, innovative and varied building strategies have been developed to contribute to the achievement of environmentally friendly homes that are alive and "breathe."