Willis Tower harvests sun energy
March 22, 2011 (CHICAGO) (WLS) -- The Willis Tower could be turned into a giant vertical solar farm if an experiment there is successful.
As part of a pilot project started in November, a few windows on the 56th floor have been treated to harvest energy from the sun.
The company that treated the windows claims each produces the same amount of energy as a conventional solar panel. It lets daylight in but cuts heat.
If successful, more windows on the building will be treated.
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