The city is energy: a mouth where the food is related to the energy flows into and out. Throughout its history could be reinterpreted on energy, linking the form to the energy use, and how to vary the latter, also vary the first constantly. If form and function of the city depend on the availability in the area of energy networks and infrastructure and whether these have a direct impact in its spatial conformation, such as new renewable sources and technologies will change the shape of next city?