The book will cover a wide range of subjects related to rare earth elements, including the sources, detection and applications of rare earths, environmental and ecological issues related to rare earths, recovery of rare earths using physical, chemical and biological methods, recovery of rare earths from waste resources, conversion of rare earths to nano-particles and their applications. It is intended or all levels of teaching and research from senior undergraduate to higher levels and to those who are working on metal/metalloids more particularly focused on rare earth elements from a science, engineering, health and environmental perspective.