“According to the fourth annual Green Building Adoption Index study by CBRE and Maastricht University, after placing second last year, the Chicago market claimed the top spot with 66 percent of its space qualified as green certified. San Francisco slipped to second, while Atlanta, Houston and Minneapolis again claimed spots in the top five in the 2017 report. “Green” office buildings in the U.S. are defined as those that hold either an EPA ENERGY STAR label, USGBC LEED certification or both.”