Ports are very complex systems from the point of view of environment. In fact, the very existence of the port, as well as any expansion of its installations, implies a certain loss of habitat. Furthermore, the normal activities carried out in ports can be associated, one way or another, with environmental impacts: waste water discharges, air pollution, noise, soil contamination, dredging, waste production, accidental releases into water or air, etc. (Trozzi and Vaccaro, 2000).