Located in Italy, the Unified Institutions building in Italy completed by Hoflab is as energy efficient as possible. The architects wanted the headquarters to be modern in more ways than just looks, so took the time to ensure the structure did not have a massive carbon footprint.
To do this the firm used a "metal sunscreen, small scale wind turbines, as well as [a] solar thermal and photovoltaic system," as stated on DesignBoom. All of these aspects helps to contribute to the energy efficient abilities of the Unified Institutions building in Italy, while still making the entire piece of architecture look good. Everything blends in well with the surroundings so that the headquarters don't stick out amongst the natural environment, which can really take away from the final structure.
Photo Credits: designboom, hoflab.it