The FedEx Cargo Facility at O'Hare just completed a 175,000 sq. ft. green roof— the only airport with a larger one is Frankfurt. There are a dozen other green roofs between O'Hare and Midway, but none can rival this. Earlier this year, O'Hare opened a high-tech vertical farm which fills much of the airport's need for veggies. It's funny to watch all this green stuff happening at the site of heavy pollution. [Sustainable Business]
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