Green Makeover Meets Scalability Challenges
The Willis Tower (Sear Tower) is undergoing a green renovation that will confront scale issues that are not present in smaller buildings. It will serve as a lab for efficiency retrofit buildings. And, because of its scale, energy savings will be significant. ...
... "the only visible sign of what the owners hope to be an environmental model for the world is a pallet of dirt and sedum on the tower's 90th floor roof, the beginnings of a green roof so high that only mountain vegetation can grow there. " ...Via Chicago Tribune: Willis Tower