The Green YOUth Changemakers project was born out of the urgent need to transform young people from passive observers of the climate crisis into active shapers of sustainable futures. Across Europe, and particularly in Central and Eastern Europe, young people often express concern about climate change but lack the skills, opportunities, and platforms to turn awareness into meaningful action. Our project addressed this gap by creating a structured, inclusive, and empowering framework where young people from Romania and Bulgaria could learn, practice, and lead environmental activism at both local and European levels. What we wanted to achieve was twofold: to raise environmental literacy among youth, and to provide them with practical pathways to civic participation and structured dialogue with decision-makers. The project responded directly to the European Youth Goal #10 “Sustainable Green Europe” and to the Erasmus+ horizontal priorities of inclusion, sustainability, and democratic participation. By designing a process where young people learned not only the theory of sustainability but also engaged in action—through mobilities, campaigns, debates, and hands-on activities—we sought to empower them as multipliers of change in their schools, communities, and networks. The objectives of the project were clearly defined and consistently guided our implementation: 1. To educate 130 young people aged 15–19 from Romania and Bulgaria on environmental literacy. We aimed to create a strong foundation of knowledge, ensuring that participants understood the science of climate change, the importance of biodiversity, and the principles of sustainability. This was not limited to theory; young people were engaged in practical workshops, study visits, and campaigns where they could apply this knowledge. 2. To raise young people’s environmental consciousness by making them aware of the difficulties arising from a lack of understanding about climate and the environment. Many young people feel disconnected from environmental issues because they see them as abstract or distant. Our project helped them recognize how these challenges directly impact their daily lives, their communities, and their future opportunities. Through interactive debates, plogging events, and awareness campaigns, we transformed abstract concerns into tangible actions. 3. To develop green competencies for 130 young people aged 15–19, providing them with knowledge, skills, and attitudes for sustainable living and environmental activism. Green competencies were at the core of the project: from learning to separate waste and recycle, to advocating for policy changes, to mastering digital tools for environmental campaigns. These competencies went beyond environmental know-how—they included teamwork, intercultural dialogue, leadership, and digital literacy, thus making the participants more resilient and adaptive to modern societal challenges. 4. To create space and provide a platform for participating youth and decision-makers to engage in dialogue at local, national, and EU levels. We wanted young people to experience what it means to be part of a democratic process. They were not passive recipients of knowledge; they were invited to sit at the same table with local authorities, school leaders, municipal representatives, and EU-level policymakers. This dialogue was critical in building self-confidence and teaching young people that their voices matter and can influence decisions that shape their communities and environment. Beyond these formal objectives, the project also pursued transversal goals aligned with Erasmus+ values: promoting inclusion and diversity by engaging young people with fewer opportunities, encouraging green practices in all mobilities and events, and using digital tools to expand outreach and ensure long-term sustainability of the results. Ultimately, the Green YOUth Changemakers project wanted to achieve more than just a series of activities; it aspired to ignite a long-term movement of environmentally aware, active, and empowered young citizens. The vision was to ensure that these young people would not only change their own habits but also inspire peers, families, and communities to adopt more sustainable lifestyles, thus amplifying the impact far beyond the immediate participants. By investing in their education, activism, and participation, we contributed to building a generation of leaders who will carry forward the fight for a greener, fairer, and more sustainable Europe.