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- Managing space debris: risks, mitigation measures, and sustainability challengesPublication . Leal Filho, Walter; Dinis, Maria Alzira Pimenta; Hunt, Julian; Abubakar, Ismaila RimiSpace debris consists of non-functional, human-made objects remaining in Earth's orbit or entering the atmosphere, creating significant challenges for space operations. Current surveillance systems track nearly 40,000 larger debris fragments, yet it is estimated that hundreds of thousands of smaller pieces and millions of tiny, untracked particles further contribute to the risk of high-velocity collisions. These objects threaten spacecraft integrity, satellite functionality, and the long-term sustainability of space activities. This review article investigates the hazards posed by space debris, providing an overview of its impact on satellite operations, crewed space missions, and orbital stability. It examines risk mitigation strategies, including the enforcement of stricter disposal regulations, advancements in satellite design for controlled re-entry or deorbiting, and the active removal of large debris objects. A structured approach to space debris mitigation is also explored, outlining a proposed four-step strategy: designing spacecraft for impact resistance, implementing advanced remote tracking and monitoring systems, integrating onboard detection and avoidance mechanisms, and developing impact mitigation strategies to minimize damage. Additionally, the importance of enhanced tracking technologies and international cooperation is underscored, as collective efforts are necessary to address this escalating issue. Increasing awareness of the growing risks and exploring practical mitigation strategies strengthens ongoing efforts to safeguard space activities and ensure the long-term viability of Earth's orbital environment.
- Enhancing the contribution of higher education institutions to sustainable development research: a focus on post‐2015 SDGsPublication . Leal Filho, Walter; Henrique, João Paulino Pires Eustachio; Veiga Ávila, Lucas; Dinis, Maria Alzira Pimenta; Batista, Karina; Borsari, Bruno; Abubakar, Ismaila RimiSustainable development (SD) research is vital in providing a basis for progress in this rapidly growing field of inquiry. In this context, higher education institutions (HEIs) and leading top researchers belonging to them are playing a key role. Despite this being widely acknowledged by the academy, it is largely unclear how individual HEIs, and their researchers contribute to sustainability research efforts. Based on the need to unveil this landscape, our article reports on a study that identified the leading HEIs and researchers involved in sustainability research and how they contribute to moving the field forward. A bibliometric assessment of the literature (performance analysis) was conducted to identify the number of publications of leading authors and institutions. The results reveal some interesting trends. First, the co-occurrence analysis technique revealed what the top 10 authors in SD are exploring. Also, the study identifies diverse thematic clusters, covering areas like technology, sustainability assessment, integrative education, and corporate practices. The paper advances SD theory by illustrating how these themes interconnect and complement each other. The article concludes with suggestions of how universities may engage further in sustainability research. The theoretical and practical implications of the research, as well as its limitations, are also addressed.