The purpose of this paper is to promote sustainability as an important research topic within the computer-supported collaborative learning (CSCL) community. CSCL can play a crucial role in the achievement of sustainability, which is paramount for the well-being of current and future generations. While CSCL brings formal educational settings to mind, computers and cooperative learning should be considered in a wider perspective since learning also takes place in and through people’s everyday practices. This paper considers two on-going research projects outside mainstream CSCL research, to illustrate ways that technology can lead to changed practices for the benefit of increased environmental and social sustainability. The projects concern children’s online practices and social sustainability, and information and communication technology (ICT) and practices in sustainable agriculture, respectively.