SEEDS is a project that focuses on creating environmentally sustainable and economically feasible energy scenarios for countries undergoing an energy transition. Through this approach, SEEDS seeks to create achievable pathways for Portugal’s energy sector, used as a case study, to transition towards a more sustainable future. This project integrates various approaches, including an optimization of the energy system, derived from the Calliope model, participatory feedback from the local population, and an environmental analysis that seeks to go beyond carbon emissions. In this report, we describe the methods and results of the environmental impact assessment energy scenarios for Portugal. The scenarios and indicators included in here take into account the participatory process carried out within the SEEDS project. Version 2 updates indicators and reviews calculations.