The California Green Building Standards Code, known as CalGreen, is the first statewide green building code to be adopted in the United States. CalGreen is regularly updated in an effort to improve general public welfare by enhancing the design and construction of buildings and encouraging sustainable practices. Green building is a Whole-Systems approach for designing and constructing buildings that conserve energy, water, and material resources and are healthier, safer, and more comfortable.
In practical terms, green building includes: