Green Building is the practice of increasing the efficiency with which buildings and their sites use and harvest energy, water, and materials which will reduce the building impacts on human health and the environment which is connected to the complete building life cycle.

Green Building is the practice of designing, planning, and constructing buildings where the priority and emphasis is placed on the current and future environmental impact of the building.

Green Building is also sometimes known as "sustainable building", "environmental building", "green home building" or just simply "green" which also leads to additional confusion. The U.S. Green Building Council's definition of Green is "a high performing home that's energy and water efficient, has good indoor air quality, uses environmentally sustainable materials.