Portal:Energy/Selected picture/29
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Manhattan_at_Dusk_by_slonecker.jpg/640px-Manhattan_at_Dusk_by_slonecker.jpg)
Photo credit: Diliff
The Empire State Building is being transformed into a more energy efficient and eco-friendly structure, at a cost of $120 million.
Photo credit: Diliff
The Empire State Building is being transformed into a more energy efficient and eco-friendly structure, at a cost of $120 million.