ABSTRACT
ABSTRACT: The environmental indicators are characterized by a low degree of aggregation and a high amount of information [1]. An indicator must show a synthetic representation a real environmental so that they can be easy used by policy maker. It is necessary to connect the various systems of the environment in an integrated system. A possible model of ecosystem-city, illustrated in this paper, o define a model that allows us to estimate the sustainable city, the indicators are not aggregated, seeing that the various structures of the some ones, then for every indicator a weight is assigned with reference to an other weight indicator, for the calculation of which a procedure based on logic fuzzy has been used. The final result will be a combination of values assigned by various judges for various criteria, processed through fuzzy logic, so that to obtain a major objectivity.
