Do we have enough green experience to develop sustainable towns?

Wind Turbine

Gordon Brown has kick-started his leadership campaign by pledging to set up five low-carbon towns across UK, with the first one destined for Oakington Barracks in Cambridgeshire. The new towns of up to 20,000 homes will be powered by sustainable energy sources such as solar and wind power, but do we have enough experience to develop successful 'green' mega-developments?