The Rose City is topped by many of its peers for promoting green building certification, construction

Portland ranked No. 16 — in the middle of the pack — among the top 30 U.S. cities in the 2017 National Green Building Adoption Index.

The survey was sponsored by CBRE, a real estate firm, in partnership with Maastricht University.

Chicago scored the highest among the 30 biggest cities for green building adoption, followed by San Francisco and Atlanta.

Portland climbed two spots in the 2017 survey, after dropping three spots the prior year.

Portland had the 13th-highest percentage of square footage of LEED-certified buildings, which stands for Leadership in Energy and Environmental Design.

COURTESY PHOTO - The U.S. Green Building Council promotes LEED, the Leadership in Energy and Environmental Design certifications. Nationally,researchers reported that 38 percent of commercial office space in the 30 largest U.S. office markets have been certified as "green" or energy-efficient, up from 37 percent the prior year and up from 5 percent in 2005.

About 10.3 percent of commercial office buildings in those markets are certified through the Energy Star program, representing 31.7 percent of total commercial office space.

LEED certifications represented 4.7 percent of the total number of commercial office buildings in those top 30 markets, up from 4.6 percent the year before. By square footage, 18.7 percent of those buildings were certified by the U.S. Green Building Council, which oversees the LEED system.

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