FedEx Express’s O’Hare cargo facility has added its 175,000-square-foot roof to a growing roster of green roofs at Chicago’s airports. Sustainable Business reports that it’s the second largest airport green roof in the world and one of thirteen at Chicago’s O’Hare and Midway airports. “Green roofs act like a sponge for heat, light and water and they conserve energy by maintaining a constant …
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