Book excerpt: Chitosan-based hybrid nanomaterials for environmental remediation focuses on chitosan, an abundantly occurring biopolymer, to present possibilities for the removal of contaminants and a greener approach towards a cleaner environment – combining nanotechnology with the deployment of naturally occurring materials to remedy environmental challenges. This book fills up research gaps, and the knowledge lagging in the context of chitosan-based nanomaterials. Considering the importance of naturally occurring materials with the applied knowledge of nanotechnology in the field of environmental restoration Covers properties, synthesis, and characterization of chitosan nanostructures and their utilization in the removal of contaminants Highlights the latest developments on the utilization of chitosan in environmental restoration Summarizes the importance of chitosan nanostructures for several applications