Communities need to engage in initiatives that tackle environmental sustainability issues. However, the lessons communities learn from these initiatives may go far beyond the initial local project. This article presents findings from an empirical study investigating the experiences of 38 residents who began participating in on-site composting in their apartment buildings. It was found that resident learnings extended beyond composting. Free-choice learning outcomes varied by the composting method and educational approach. For some residents, participation resulted in a greater awareness of food waste produced. For others, their involvement in on-site composting inspired a greater sense of community, a deepened connection with nature, and a desire to grow green spaces and create positive global change toward sustainability.