Cities are a mirror of our society and of our behaviour toward the future. Cities have been the centre of the industrial revolution and of the incredible economic growth after WW2; due to this evolution, cites have become the most polluted areas in almost all the European states. Cities are nowadays the centre of the economical, social and political activity: the countryside is far, different and disconnected. We need both to implement mesures toward green energy both to reconnect the social and physical space between cities and the countryside. Only in this way we’ll be able to build a sustainabke future, both from the environmental both from the social point of view.