nd human capital, pace of innovation, raw and new material and social acceptance of risks and breach in privacy, potential losses of societal cohesion. In a way, "perpetual motion" is also best illustrated or at least compatible with a linear infrastructure concept of urban development, shown below, in which cities are built as input-output models, taking all kind of resources from the environment at large and expelling all sort of wastes as a result of the process. INFRASTRUCTURE TO 2030: TELECOM, LAND TRANSPORT, WATER AND ELECTRICITY - ISBN 92-64-02398-4 - © OECD 2006 A CROSS-SECTORAL PERSPECTIVE ON THE DEVELOPMENT OF GLOBAL INFRASTRUCTURES TO 2030 Figure 1.2. The "perpetual motion" scenario Interactive displays Building facades communicate with your become personal digipad device and interactive as "Always on" culture display media that is They turn into Lots of private vehicular traffic, but low-emission vehicles are the norm and sustainable forms of energy are Narinder Sagoo/Foster and partners Access to your Fully guided Personal digipad diary, contacts, vehicles allow you devices give you Flexible seating and financial to dispense with a instant access to means that you can information is steering wheel messages and have face-to-face available at all altogether, allowing individual media, meetings while you times you to conduct video allow you to interact are on the move, and meetings and work wirelessly to the frictionless vehicle while you are on world around you technology ensures the road and also to store a smooth ride Source: DTI Foresight Intelligent Infrastructure Futures, The Scenarios - Towards 2055, Scenarios overview, p. 10 (2006). Figure 1.3. Linear infrastructure Food and water Sewage Paper, plastics, packaging Waste dumps Fuels and energy Emissions CO2, NOx Building materials Waste disposal Information Information overload, missed signals Transport Congestion Source: Adapted from Girardet, H. (1992), The Gaia Atlas of Cities, New Directions for Sustainable Urban Living, London: Gaia Books Li