A real estate investment group that owns the Sears Tower said it is pushing forward with plans to build a 500-room environmentally friendly hotel next door to North America's tallest building, but released few details on financing for a project that will cost as much as $225 million. The group, which includes investors Yisroel Gluck, John Huston, Joseph Chetrit and Joseph Moinian, said they would spend $350 million to make the 110-story tower more environmentally friendly and reduce the amount of energy it uses. It plans to cut the equivalent of about 150,000 barrels of oil used annually by such steps as replacing the tower's 16,000 windows with more energy-efficient alternatives, adding solar panels, more efficient gas boilers and motion detectors so that escalators operate only as needed.

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