Universities play a critical role in fostering environmental awareness and sustainability. The University of West Attica in Athens, Greece, implements a unique environmental education program known as the Skyros Project, which integrates experiential learning with artistic expression. One of its most distinctive activities is Trash Art, an artistic practice where students create mosaic artworks using waste materials. This initiative aims to encourage waste reduction, recycling, and a shift in environmental attitudes among participants. The study explores how Trash Art contributes to fostering environmental awareness by analyzing participants’ perceptions and experiences. Rather than assessing effectiveness through quantitative metrics, the study examines the role of Trash Art in shaping environmental attitudes through qualitative insights. By analyzing participants’ environmental perceptions before and after their involvement in the program, the study highlights how creative interventions can contribute to sustainability education. This study examines the effectiveness of Trash Art as an educational tool for raising awareness about climate change and sustainability. A systematic literature review was conducted to explore the relationship between environmental art and behavior change. Additionally, the study evaluates shifts in environmental attitudes among participants of the Skyros Project, measuring their willingness to adopt sustainable behaviors. The materials used in Trash Art creations—such as glass, stones, bottle caps, and other discarded items—symbolize the transformation of waste into meaningful artistic statements, reinforcing the importance of circular economy principles. The findings indicate that engaging in Trash Art significantly enhances participants’ environmental consciousness and fosters a sense of responsibility toward sustainability. This research highlights the potential of art-based educational interventions in climate change communication, demonstrating that artistic engagement can be a powerful tool for behavioral change. The conclusions drawn from this study provide insights into how universities can integrate creative approaches to environmental education, fostering long-term ecological awareness and action among students.