The Leadership in Energy and Environmental Design (LEED) rating system, devised by the U.S. Green Building Council (USGBC), is the world's most popular green building brand. But challenges and alternatives to LEED are increasingly appearing, exposing some of the rating system's limitations. How far this backlash grows could have implications for all of commercial real estate. In fact, the Urban Land Institute's Sustainable Development Council plans a program on challenges and alternatives to LEED during the ULI Spring Meeting in May. See Full Article.