STELLA is an EU co-funded KA2 Erasmus+ project that empowers young people and youth organizations to tackle climate change by using sport as a tool for environmental education. As part of our commitment to promoting sport as a powerful tool for environmental sustainability, we have collected a selection of 75 best practices, projects, and actions from around the world and our partner countries (Cyprus, Greece, Italy, Malta, Portugal). These examples aim to inspire youth organizations and stakeholders by showcasing real-life initiatives that successfully combine sport and sustainability. The collection is divided into six categories — Projects, Programs, Activities/Workshops, CSR Actions, Competitions/Events, and Organizations — offering a wide range of approaches to educate, engage, and act for a greener future through sport.