Carpets, glues, cigarette smoke, paints, plywood, emit gas, formaldehyde, benzene which are linked to cancer, anaemia, lung disease. These are in most workplaces and homes. We speak with Johanna Truestedt, based in Switzerland, she is Senior Consultant for Drees and Sommer on how we can improve air quality, making the working and living environment healthier by learning how the building lives.