This workshop aims to explore the connection between sustainability and 6G mobile networks, focusing on integrating environmental considerations into the design, deployment, and operation of future wireless communication systems. It will convene EU-funded collaborative projects to develop energy-efficient network architectures, renewable energy integration, life cycle assessments, eco-friendly materials, and policy frameworks. The goal is to catalyze advancements towards a more sustainable and environmentally responsible era of wireless communication, promoting innovative approaches, green technologies, and holistic strategies for minimizing the ecological footprint of 6G networks.