Chicago's Willis Tower receives highest level of green certification
The skyscraper became the largest building in the U.S. to reach highest level of energy efficiency
via FOX BUSINESS NEWS https://ift.tt/36MthoC
FOX BIZ NEWS: Chicago's Willis Tower receives highest level of green certification
Chicago's Willis Tower receives highest level of green certification
The skyscraper became the largest building in the U.S. to reach highest level of energy efficiency
via FOX BUSINESS NEWS https://ift.tt/36MthoC
