The project, our first at Langara College, in Vancouver, is conceived as an environmental form, shaped by the natural forces acting upon it. The sustainable design approach is the expressive vehicle and the essential experience of the architecture. Wind and rain patterns determine the geometries of the curved roof, while wind towers encase the circulation stairs, creating a stack effect that allows the building to breathe organically. The building is heated and cooled geo-thermally and naturally ventilated, which makes it 71% more energy efficient than the Model National Energy Code.