The boom in technological advances in recent decades has led to increased demand for rare earth elements (REEs) (also known as rare earth metals) across various industries with wide-ranging industrial applications, including in the clean energy sector, but with some environmental, economic, and social footprint concerns. This paper reviews the complexities of the production, consumption, and reuse or recovery of REEs, presenting current trends in terms of potentials and challenges associated with this. This paper in particular focuses on the supply, demand, and (environmental and economic) sustainability of REEs, as a subset of critical raw materials. It does so via a critical stocktaking of key discussions and debates in the field over the past 15 years up until now, through a thematic analysis of the published and gray (policy) literature with a grounded theory approach. The paper finds that carefully balanced lifecycle sustainability assessments are needed for assessing the respective dimensions of the extraction, processing, and reuse or recovery methods for different types of REE sources and supplies to meet current and future demands. It furthermore diagnoses the need for taking into account some shifts and substitutions among REEs also for reasons of cost and locational supplies for the security of supply. Finally, the paper provides some overall policy recommendations for addressing current problems, with a conceptual framing of the UN Sustainable Development Goals.

This paper reports on a comprehensive study, which has investigated the approaches, methods and tools being deployed in implementing living labs among higher education institutions (HEIs) around the world. Two methods were employed. First, a bibliometric analysis of the current emphasis given to living labs in a sustainable development context and in the implementation of the Sustainable Development Goals (SDGs). Second, an empirical study aimed at identifying the use levels of living labs at HEIs. This was accomplished through an analysis of selected case studies that showcased successful approaches to SDGs implementation with living labs, and resulted in a framework for action. There are three main findings from these analyses. The first is that the multidisciplinary character of living labs in the context of sustainable development needs to be considered, to maximize their impacts. Second, most of the studied living labs focus on SDGs 4 and 11, which deal with providing quality education and ensuring the sustainable development of cities and communities. Third, the challenges encountered in the implementation of living labs refer to (1) the complexities in institutional administration, (2) the tensions between different groups of interest that need to be addressed by enhanced communication, and (3) the necessity to pay attention to the demand of using sustainability and innovation as a strategy in the operations of living labs. The paper draws from the experiences and lessons learned and suggests specific measures, which will improve the use of living labs as more systemic tools towards the implementation of the SDGs.