By 2050 we will make smart living choices by using the available space efficiently. We will own less space of our own, but we will share more space with others. We will reuse our home furnishings as much and as often as possible. Traditional transport networks will have made way for blue-green infrastructure, creating a pleasant living environment in and around heat-proof urban centres. By 2050 all existing housing will have been gradually made more sustainable, and energy consumption will be a major consideration when buying a new home. We will reuse or recycle all building materials and our flexible, carbon-emission-free homes will be built for reassembly. All the energy we use will be renewable.