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a tall building with a spiral staircase going up it's side
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a tall building with a spiral staircase going up it's side

The "Powerhouse" in Porsgrunn designed by norwegian architectural firm Snøhetta produces more energy than it uses.

A map markerPorsgrunn, Norway
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porsgrunnnorwayarchitectureenergy efficientpowerhousesnøhettahandrailbanisterHd wood wallpapersbuildingoffice buildingstaircaseindoorsinterior designconvention centerhardwoodPublic domain images

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