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CHICAGO - Wind turbines, roof gardens and solar panels will join the pair of antennas atop the Sears Tower's staggered rooftops, said building officials who announced Wednesday that the skyscraper would undergo a $350 million green renovation.
The 5-year project would reduce the tower's electricity use by 80 percent and save 24 million gallons of water a year, building owners and architects said. Separately, a 50-story, 500-room privately funded luxury hotel with its own green components would be built next to the skyscraper in 3 1/2 to 5 years.