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Solar canopy
Solar canopy
At 75,000 square feet, the one-piece roof on Masdar's headquarters is made of a steel trellis outfitted with electricity-generating solar cells. The canopy will connect 11 cooling towers.

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Last updated December 03 2008: 10:34 AM ET
Eco-friendly city of the future The Emirate of Abu Dhabi begins construction on its green city, Masdar. See the plans for this $15 billion undertaking. More video