Washington, D.C. (September 13, 2011) – The U.S. Green Building Council’s (USGBC) next update to the LEED green building program, coined LEED 2012, will include updates to the Materials & Resources (MR) credit category. The updates reflect thousands of write-in comments received through the first LEED public comment period and include changes to existing LEED credit categories as well as two new credit categories, Integrated Process (IP) and Performance (PF).