This book presents information on the origin and distribution of microplastics, evaluates the methods of their detection, documents their interactions with natural systems, and analyzes the current understanding of their management. Owing to the size, varied compositions, pathways of transport, accumulation and myriad processes of interactions with ecosystems, the microplastics pose severe threats to ecosystem services and natural environmental systems. Therefore, the environmental challenges that microplastics present and the strategies to mitigate their harmful impacts are of great importance to the scientific community, and only a few publications exist that collate this information in a single resource. The book aims to be a comprehensive resource for students, professionals and practitioners of environmental studies on microplastics and how to better understand the threats they pose and the practices to manage them.