This contributed volume explores the potential of deep eutectic solvents (DES) as sustainable alternatives to conventional solvents in various industries. It covers various applications, including uses of DES in biomass processing, food and pharmaceutical industries, electrochemical systems, CO2 capture, and more. The chapters highlight the unique properties of DES, such as biodegradability, low toxicity, and tunability, emphasizing their role in green chemistry and sustainability. They also address challenges including stability and recyclability while proposing strategies to overcome these limitations. This book provides valuable insights into how DES will shape future innovations in sustainable technologies.