Leadership in Energy & Environmental Design, LEED, Certification is granted by the U.S. Green Building Council. LEED buildings are resource efficient, use less water and energy, and reduce greenhouse gas emissions. A LEED building provides health benefits to its occupants as well as to the environment. LEED buildings must meet criteria in six categories, including Sustainable Sites; Water Efficiency; Energy & Atmosphere; Materials & Resources; Indoor Environmental Quality; and Innovation & Design Process. A Metro ordinance states that Metro buildings of 5,000 square feet or larger must be built or renovated to LEED® Silver or greater levels of certification. In accordance with the ordinance, General Services is proud to have 21 LEED certified buildings in its portfolio.