A long-term study of two faculty development programs on sustainability and the environment reveals enduring changes in teaching, research, interdisciplinary collaboration, and engaged action. Participants in cohorts of Tufts University's Environmental Literacy Institute (12-16 years ago) and Emory University's Piedmont Project (1-5 years ago) reported substantial numbers of new and renovated courses and multiple innovations in teaching methods. Results included new interdisciplinary research, grants, and publications; expanded knowledge and practical action; and strengthened collegial community connections with the natural world. (Contains 5 tables and 2 notes.)