SustainabiliCity empowered young people to become active and engaged citizens who participated in decision-making processes related to city sustainability. We developed participants' skills in project leadership, communication, and problem-solving, which were valuable for their personal and professional growth. We also raised awareness among young people about environmental and social issues in urban areas, fostering a sense of responsibility for their communities. Another important goal was to encourage youth to engage with their local communities and work collaboratively with them. We fostered creativity and innovation by encouraging young people to develop sustainable solutions and projects tailored to the needs of their cities, inspired by the exchange. Through this project, we provided networking opportunities for participants to connect with peers, mentors, and organizations from different countries, which helped them realize similar projects in the future. Promoting cultural exchange and understanding among participants from diverse backgrounds was another important objective we achieved. Needs and issues -The Danish group believed that Copenhagen was a very sustainable city, but at the same time, Danes had the highest consumption of goods in Europe and the highest production of waste. Even if the authorities were very good at dealing with waste, the best solution was to prevent waste production by reducing consumption. The group needed more education as well as international collaboration. -The Polish group actively explored the possibilities of implementing the Sustainable Development Goals, especially in terms of climate action and responsible consumption. It was they who, when looking for partners through the SALTO portal, encouraged us to work together. The Polish group came from an area in transition after the closure of coal mines—an area looking for new solutions, including sustainable transport. They were also involved in campaigning activities and were active in their city. That year, their town of Piekary Śląskie won the title of Fair Trade Town after a successful two-year youth campaign. They were also co-organizers (as a youth centre) of the Fair Trade Town Game, which had been running for 13 years and encouraged people to change the world for the better. -The Austrian group needed more international projects and new ideas on how to make their city greener. They met a group of young people from Denmark during the “My Revolution” project, where they were involved in drafting demands for the European Parliament in areas such as sustainable transport and climate action. There, they decided to implement the project together. -The Slovenian group believed that Ljubljana was a very green city. Their capital had been the European Capital of Culture, but there were still many sources of pollution, and they could benefit from more ideas on how to make their city more sustainable. -Romania had a significant problem with plastic pollution in rivers. While there were many campaigns to clean the rivers, there was a need to do more in this regard. Youth needed concrete solutions that they could implement in their communities. International projects such as SustainabiliCity were a great source of inspiration for solutions they could implement locally. -The Italian youth were very interested in travelling to new countries and learning about new cultures. Their team was interested in sustainability and in discovering new ways of implementing sustainable solutions around Catania. Their region (Sicily) lacked employment opportunities, and the project strengthened their employment chances. This project aimed to bring together youth from cities with very different environmental profiles to learn from each other and exchange knowledge, skills, and good practices. Our goal was to make youth aware of what sustainable urban development could look like and to show that it was achievable. Copenhagen – a champion of sustainability Vienna – a champion of sustainability Bucharest – the most polluted capital in the EU Ljubljana – European Green Capital Catania – home to some of the most polluted urban beaches in Italy Katowice – the second most polluted city in the EU Objectives (achieved) - Developed sustainable solutions that could be implemented in local communities. - Shared knowledge, experiences, and skills related to the Sustainable Development Goals and urban sustainability. - Formed international connections, acquired new language skills, and learned more about other cultures. - Acquired new knowledge and a deeper understanding of the circular economy and identified best practices in environmental action. The YE SustainabiliCity involved 37 young participants (6 per country and 7 from Denmark) Venue: Copenhagen (Denmark), Dates: 15-22 November 2025