The first car rental facility in the U.S with a LEED Silver certification, the Enterprise Rental Car Facility at O’Hare International Airport includes the Maintenance Building 3,627 sf greenroof and the 2,847 sf Customer Service Center, and shows the company’s commitment to sustainable building. “The O?Hare facility, which opened in June 2010, recently became the car rental industry?s first Leadership in Energy and Environmental Design (LEED) Silver-certified independent car rental location. A significant percentage of the materials used in construction of the facility were from regional sources to reduce the carbon footprint associated with transporting materials.

“Other sustainable features of the Enterprise O?Hare location include: a ?green? roof system that insulates the building and provides a suitable habitat for native plants; storm water detention/retention to reduce discharge into downstream watercourses; energy-efficient lighting; and a system for recycling car wash waste water. To date, these features have reduced the facility?s water use by 22 percent and energy use by 15 percent,” (Enterprise Holdings, 2010).

According to the Chicago Dept. of Aviation, there is currently 229,355 square feet of green roof space at O’Hare International Airport, with an additional 108,816 square feet proposed as of February, 2011.