(OilPrice) The Söder Torn is one of the tallest buildings on the island of Södermalm, and a land mark in the city of Stockholm. Completed in 1997 it is actually several stories shorter than its architect, Henning Larsen, had originally planned, but a new retrofit aims to rectify this.

Belatchew, a firm of architects based in Stockholm, has proposed adding an additional 14 floors to the tower to bring it closer to Larsen’s vision; but more importantly, they have also suggested that the tower be covered in millions of piezo-electric straws which could collect energy from movements in the air and convert it into clean energy for the building.

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