The project’s purpose is to professionalize youth work by integrating environmental sustainability with participatory mapping methodologies. We seek to move beyond theoretical environmental awareness, equipping youth workers with practical, non-formal tools to transform local ecological challenges into learning opportunities for young people, especially those from marginalized backgrounds. Our primary aim is to enhance the quality of youth activities by providing practitioners with a "Green Competence Framework," allowing them to act as multipliers for sustainable development within their NGOs. By bridging the gap between high-level EU green policies and grassroots youth work, we foster active citizenship and social inclusion through community-based ecological initiatives. Specific Project Objectives: Objective 1: Methodological Professionalization. To equip 10 youth workers from the 3 partner countries with the "Eco-Mapping" methodology. By the end of the training, 100% of participants will have designed a "Local Sustainability Map" template, with a commitment to implement at least 2 mapping workshops in their home organizations within 6 months, directly impacting at least 60 young people. Objective 2: Competence Development. To increase the professional capacity of participating youth workers in digital and analog participatory tools by 30% (measured via Youthpass self-assessment and pre/post-project rubrics). Focus areas include critical thinking regarding local environmental policies and the ability to facilitate "Green Active Citizenship" for disadvantaged youth. Objective 3: Strategic Internationalization. To establish a permanent Transnational Green Network between the 3 partner organizations. By 12 months post-project, this will result in at least one joint "Eco-Community" follow-up initiative or a strategic partnership proposal focused on the European Green Deal. Objective 4: Resource Capitalization. To co-create and publish an "EcoCommunity Mapping Toolkit." This digital resource will be integrated into the internal training protocols of all 3 partner organizations, ensuring that the project results lead to long-term organizational development and a standardized approach to green youth work. From a practice standpoint, this project addresses the lack of concrete tools for youth workers to engage with the "Green Transition." Instead of generic discussions, we use mapping as a pedagogical tool to make youth work more learner-centered and community-anchored. This methodology is particularly effective for marginalized youth, as it allows them to visualize their role in their local ecosystem, fostering a sense of belonging and agency. By aligning with the EU Youth Strategy (Engage, Connect, Empower) and the European Green Deal, the project ensures that youth workers are not just organizers, but strategic actors in their communities’ sustainable development. This shift from "organizing a training" to "building community capacity" directly addresses previous concerns regarding generic project relevance.