ot Project Program, also referred to as LEED Version t.o, was launched at the USGBC Membership Summit in August 1998. After extensive modifications, LEED Green Building Rating System Version 2.0 was released in March 2000, with LEED Version 2.1 following in 2002 and LEED Version 2.2 following in zoos. As LEED has evolved and matured, the pr