MINNEAPOLIS, Minnesota, April 22 -- The University of Minnesota issued the following news release: * * * University of Minnesota's Northrop achieves LEED O+M gold certification for sustainability efforts The University of Minnesota has achieved a major sustainability milestone: Northrop, one of the university's most iconic and historic buildings, is now Leadership in Energy and Environmental Design (LEED) v4.1 Operations & Maintenance (O+M) Gold certified through the U.S. Green Building Counc  more