The LEED certification is an internationally recognized green building certification which provides 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." These metrics include energy savings, C02 emissions reduction, and improved indoor environmental quality. On this site provided by the US Green Building Council, visitors can learn about the LEED system and also learn about ongoing improvements to the system. Here visitors will find sections that include "LEED Rating Systems", "Project Certification", and "Professional Certification". One area that's particularly helpful is the "LEED Resources" area. Visitors can look through this area to find online reference guides about the LEED certification system and sample templates for use with the LEED system.