This research investigates the ways in which undergraduate courses dealing with the environment address sustainable development (SD), and contribute to the development of sustainability learning outcomes (SLO). The participants in the study were 13 instructors, and 360 students who were enrolled in 13 courses that addressed the environment in a technical university. Mixed methods were used for data collection and analysis. We found that courses that address the environment are varied in the way that they address sustainable development, and in the pedagogy they use. We also found links between teaching methods and the pattern of reported SLOs: skills development was promoted mainly in courses with a high degree of participatory learning; changes in awareness and attitudes were reported mainly in courses that addressed sustainable development, and motivation to promote sustainable development was reported mainly in courses that addressed sustainable development and also provided opportunities for active and participatory learning. The implications of our research are discussed.