1. Department of Architecture and Project, University of Rome La Sapienza, 00186 Rome, Italy
2. Department of Social Sciences and Economics, University of Rome La Sapienza, 00186 Rome, Italy
3. Department of Biosciences and Territory, University of Molise, 86090 Pesche, Italy
4. Department of Policies and Bio-Economics, CREA Council for Agricultural Research and the Analysis of Agricultural Economics, 00187 Rome, Italy
5. Eutropian GmbH, 1030 Vienna, Austria