Sustainability is becoming a key component of many HE curricula. However, questions as to what sustainability is and how it can be embedded within subject specific curriculum are difficult to answer. Focussing on existing pedagogic scholarship in this area and by drawing on experiences from my own institution, this article discusses how the GEES subjects are addressing sustainability in the curriculum. It provides both conceptual framing on the evolution of the GEES subjects in relation to sustainability and offers some practical examples of how different approaches to sustainability might be used in teaching, including challenging disciplinary perspectives and introducing interdisciplinary working around global challenges. It concludes with recommendations for how sustainability might be embedded in the curriculum in practice.