Application of Social-Life Cycle Assessment in Urban Settings: Social Impact Assessment of Green Roofs

Sustainability brings together three dimensions: environment, economy and society, as according to the Agenda 21, a comprehensive plan of action to be taken globally, nationally, and locally by organizations of the United Nations System, governments, and major groups in every area in which humans impact the environment. To define whether an intervention or process is ‘sustainable’, these spheres must co-exist and be equally contemplated. Green roofs have been extensively studied from environmental and economic perspectives, but as far as the social dimension is concerned, the literature is limited. Indeed, to define these interventions as ‘sustainable’, the social dimension must also be investigated. Over time, Social-Life Cycle Assessment (S-LCA), an extension of the better-known Life Cycle Assessment (LCA), has become widespread. S-LCA allows assessing the potential impact that a production process, and consequently a product, can have on people. This paper aims to propose a model for analyzing green roofs by identifying the possible categories of stakeholders involved in the implementation process, and the impact categories to be referred to. By defining these elements, it is possible to estimate the positive or negative social impact that interventions cause. The results of the survey offer insights into social issues related to the implementation of green roofs by focusing on the stakeholders involved within the entire life cycle.