Sustainable design is not only about energy efficient buildings: Designer should also think about whether they can change people's behavior towards the environment. Can architecture do that? Instead of driving to the office, consider cycling? Reducing the amount of business air travel? The emissions of one passenger on the outward flight from Vienna to Amsterdam creates the climate impact of about 270 kg CO2 (540 kg CO2 including the return trip) (source: www.atmosfair.de). That’s almost a quarter of one year car driving (12000 km, middle class model). But who is willing to give up air travel? We definitely need to find acceptable and comfortable alternatives to our wastefulness!