The total emergy flow is obtained by summing all the emergyflows relative to the inputs, with the exception of sun, rain andwind, since they can be considered as co-products: the maximum ofthe three inputs is the one taken (Odum, 1996). Inputs are classifiedin three categories: local renewable (R), local non-renewable (N)and imported (F). In order to calculate the energy flows of wind bya stretch of land where Orbetello city is placed, which containsapproximately 7500 inhabitants. The lagoon has an average depthof 1 m and the tidal range is between 0.10 m and 0.45 m. The lagoonexchanges water with the sea by three narrow canals.