Advancing Technology and Addressing Toxicity: The Dual Impacts of Rare Earth Elements on Materials and the Environment

Rare earth elements (REEs) have emerged as a vital category of material resources, garnering widespread attention in recent years due to their growing importance in the advancement of high-tech innovations and the global transition to a low-carbon economy. As the world accelerates efforts to implement sustainable solutions and reduce dependence on fossil fuels, REEs have become indispensable components in contemporary technologies because of their specialized functionalities. Despite ongoing concerns about unstable supply chains and the environmental impact of their production, global demand forREEs continues to rise.REEs play a critical role in a variety of cutting-edge applications, including renewable energy technologies, electric vehicles, advanced electronics, and defense systems.Their unique physicochemical properties-such as exceptional magnetic strength, luminescence, and thermal stability-make them integral to the materials and devices that support both digital innovation and the green economy.However, extensive mining and long-term utilization of REEs have resulted in significant environmental degradation and posed global public health concerns.The processes involved in REE extraction, refinement, and disposal can generate toxic waste, cause ecological harm, and increase human exposure to hazardous substances.Notably, the specific toxicological effects of REE-associated airborne particulates interacting with the human body remain poorly understood.Given the rising demand, the contrast between technological benefits and environmental/health risks highlights the urgent need for more sustainable practices in REE usage and lifecycle management.This review brings together recent research on REE metallurgy, environmental impacts, and toxicity to inform strategies for sustainable development and policy regulation