LEED is an internationally recognized green building certification system,  providing third-party verification that a building or community was designed and built using strategies aimed at improving performance across all the metrics that matter most: energy savings, water efficiency, CO2 emissions reduction, improved indoor environmental quality, and stewardship of resources and sensitivity to their impacts.

Developed by the U.S. Green Building Council (USGBC), LEED provides building and home owners a concise framework for identifying and implementing practical and measurable green building design, construction, operations and maintenance solutions.

United States Green Building Council

http://www.usgbcsf.org/