The accumulation of plastics in coastal area is continuously increasing. We produce more and more amounts of garbagedaily. Single use plastics or disposable plastics are accumulated in the marine environments. Single use plastics areeffects our marine ecosystems. Single use plastics particles are broken down to produce smaller and smaller plasticsparticles. These small sized particles are called microplastics. Microplastics are harmfull to our health when we ingestedthrough food chain. Exoposure to microplastics causes serious health problems like neurotoxicity, inflammation,genotoxicity, necrosis, cancers, leukemia, tissue damage, asthma, liver damage and many more problems. This book ishelpful to schlors, scientists, readers, students, researchers, undergraduate, postgraduate students and interestedpeople.This book consists of five chapters. The first chapter gives definition of monomer and polymers, plastics,biodegradation, and resins. The first chapter describes the classification of plastics, history of plastics, types of plastics,different types of thermoplastics, and application of plastics. The first chapter also gives additives and its causes serioushealth problems. The se