Climate Changed

Chicago Is the Greenest Place to Work in America

Chicago skyline.

Photographer: Raymond Boyd/Getty Images

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Chicago is the greenest place to work in the U.S., but other cities are trying to catch up fast.

The Windy City topped a ranking of green office space certified for environmental efficiency for the third year running. The city’s percentage of certified green office space rose to 71.1%, up from almost 70% last year and 66% two years ago, according to an annual ranking by CBRE Group Inc., Maastricht University and the University of Guelph published Friday.