Poland: Xella Polska supplied its Ytong autoclaved aerated concrete (AAC) blocks for the construction of the 174m-high The Bridge skyscraper in Warsaw's Wola District. When inaugurated, the building will be Poland’s tallest, featuring 40 floors of office space. It will be equipped with a Building Energy Management System and be 100% solar powered, making it energy neutral. Xella Polska noted the insulation benefits of Ytong AAC blocks, as well as its increased fire resistance, compared with other building materials.