
Masoud Salehi
My thesis proposes an extension of Life Cycle Assessment (LCA) that makes the environmental impacts of the workforce visible — impacts traditionally left outside the system boundary. The framework is organised into three modular layers: alongside the conventional process LCA (Layer 1), it adds the direct flows arising from the physical presence of workers — commuting, personal protective equipment, staff facility energy and water (Layer 2) — and a wage-induced consumption scenario, in which workers’ salaries translate into household spending and therefore into indirect emissions (Layer 3). The method was applied to the CESA S.r.l. end-of-life vehicle treatment plant in Monza, modelled in SimaPro with ecoinvent 3.11 and the EF 3.1 method. The main result shows that the workforce can account for roughly two-thirds of the plant’s climate-change impact — a share systematically overlooked by conventional LCA, and particularly significant in labour-intensive sectors.

Laura Fernandes de Jesus
Microplastics are an emerging environmental concern that remains insufficiently represented within the Life Cycle Assessment (LCA) framework. This thesis develops an integrated assessment framework by combining multiple characterization models to evaluate microplastic impacts across environmental compartments, geographic scales, ecosystem types, and polymer characteristics. The framework is applied to a 100% virgin polyester (PES) T-shirt under scenarios representing waste mismanagement and production relocation. The results show that microplastic-related impacts account for approximately 80–90% of the total endpoint damage to ecosystem quality, while production relocation to a low-income country increases these impacts by more than one order of magnitude compared with the baseline scenario. These findings demonstrate the importance of integrating microplastic-specific impact categories into LCA to improve the environmental assessment of textile products and support more informed decision-making.















