Glossary | U.S. Green Building Council
Reminder: October 31 is the last day to register a LEED project under LEED 2009. Learn more.
Please upgrade your browser. This site requires a newer version to work correctly. Read more


area that has not been graded, compacted, cleared, or disturbed and that supports (or could support) open space, habitat, or natural hydrology.

See also: previously disturbed