We can not ignore the damage that our buildings inflict on the natural environment. As the consequences of our past inaction becomes ever more apparent, designing for a sustainable future becomes a necessity, not a choice. Sustainable design means doing the most with the least means. Following the logic of ‘less is more,’ it employs passive architectural means to reduce energy consumption, minimising the use of nonrenewable fuel and reducing the amount of pollution. Responsible sustainable design is not simply about individual buildings; it should be implemented at all scales – from product design to the design of cities. In the final analysis, sustainability is about good design. The higher the quality of design, and the more efficient the project is, the longer the project will have a role, and in sustainability terms, longevity is a good thing. The following Sustainability Policy outlines Foster + Partners’ approach to sustainable design.