Within an ecological approach to the urban environment (Giacomini, 1981; Di Castri, Baker, Hadley, 1984; Bonnes, 1987, 1991), one of the most relevant topics is the relationship people have with the natural features of the urban environment and, in particular, with its green aspect (Altman, Wohlwill, 1983; Knopf, 1987; Burgen, Harrison, Limb, 1988; Bruce, Hull, Harvey, 1989; Ardone, Bonnes, 1991). Some studies have pointed out the clear preference people have for urban settings, including natural features and, in particular, greenery; on the other hand, many studies have shown how the presence of green features in the urban environment affects inhabitants' residential satisfaction (Fried, 1982; Bonnes, De Rosa, Ardone, Bagnasco, 1990; Ardone, Bonnes, 1991). Taking into account the social psychological perspective (Canter, Correia Jesuino, Soczka, Stephenson, 1988; Bonnes, Secchiaroli, 1991) of the people-urban environment relationship and, in particular, the theory of social representations (Moscovici, 1976; Breakwell, Canter, 1993), it seems important to study people's attitudes towards urban green, giving particular attention to both the more and the less shared meanings attributed to these environmental features in order to understand the process of forming and changing these environmental representations. The aim of the present study is to investigate the meaning people attach to green features of the urban environment in order to discover i) the more and the less shared features of these environmental representations, and ii) to point out how these different meanings attributed to the urban green may be affected by the socio-demographic and socio-cultural characteristics of the people involved.