What do we mean by the term Sustainability? The quality of not being harmful to the environmental or depleting natural resources and thereby supporting long term ecological balance. Green building (also known as green construction or sustainable building) refers the using of processes that are environmentally responsible and resource-efficient throughout a building's life-cycle: from siting to design, construction, operation, maintenance, renovation, and demolition.

The United States, one of the a largest consumes of energy, yet we still have a large untapped resources for energy - sun / wind / geothermal.