Faith communities, such as churches, synagogues, temples, and mosques, are providing new venues for innovative adult environmental education. As faith communities turn their concerns to issues of sustainability, environmental teaching is emerging in many forms across diverse religious traditions, as evidenced by the development of denominational and other faith-based environmental programs, policy statements, resources, and curricula in recent decades. This chapter describes opportunities for environmental education in faith communities by reviewing important developments that have shaped religious interests in environmental topics and by highlighting examples that suggest a key role for adult educators. (Contains 8 online resources.)