Sustainability has recently been made a cross-curriculum priority in Australia, through the development and implementation of the Australian Curriculum. Subsequently, primary and secondary teachers across all subject areas are required to integrate Education for Sustainability (EfS) into formal education. A recent research case study was undertaken to determine Western Australian (WA) Graduate Diploma of Education (Primary) students' perceptions of sustainability on entering their teacher education course. This paper reports on part of the findings from this study, specifically the sources of information these pre-service teachers used to inform their perceptions of sustainability. The case study emphasised the need for reliable scientific information in mass media and pre-service teachers' mistrust of commercial media. It also underscored the need to provide specific sustainability content in pre-service primary teacher education courses.