Participatory approaches in environmental healthEnvironmental health have emerged as essential strategies for effectively addressing the complexities of ecological challenges through direct community involvementCommunity involvement. This chapter examines the theoretical underpinnings and practical applications of participatory methods, emphasizing their ability to engage communities in meaningful ways. By focusing on community-based participatory researchCommunity-based participatory research, environmental justiceEnvironmental justice, and social-ecological systems theorySocial-ecological systems theory, this chapter highlights how these approaches provide frameworks for equitable, community-driven healthHealth solutions. It also examines the benefits of participatory methods, including improved health outcomesHealth outcomes, increased community empowermentEmpowerment, enhanced environmental literacy, and strengthened social cohesionSocial cohesion. Various engagement techniques, such as workshops, focus groups, community mapping, and citizen science initiatives, are discussed to illustrate how these methods can be tailored to specific environmental healthEnvironmental health contexts. The discussion includes case studies that showcase the successes and challenges of community engagementCommunity engagement in environmental healthEnvironmental health, emphasizing the need for inclusive and adaptive approaches. The chapter concludes by presenting strategies for creating effective participatory ecological healthHealth programs that promote sustainabilitySustainability, build local capacity, and advocate for policy changes. By integrating participatory methods with broader environmental healthEnvironmental health initiatives, communities can enhance resilienceResilience, foster collaboration, and improve ecological health outcomesHealth outcomes.