Skanska's projects aspire to and regularly achieve top certifications of sustainability. Skanska in Sweden is developing Hyllie Terrass, one of the projects that is part of the Sweden Green Building Council's pilot study on ZeroCO2 certified buildings. The target of ZeroCO2 is to instigate building with a net-zero climate impact and to continue to develop the industry's sustainability work. Sustainability is also at the heart of the BoKlok concept, which is why the homes are made of timber – the most climate-smart building material.