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Sources, Types, and Environmental Persistence of Plastic Waste
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This chapter summarizes existing research on plastic waste, describing how it is categorized by size and by origin, including items that keep their original shape and others formed when larger plastics break down. It outlines industrial, domestic, medical, agricultural, and electrical sources, and discusses how long plastic waste lasts in the environment and its effects on land and marine settings.
Plastics are synthetic polymeric materials composed of long molecular chains made up of repeating interconnected units. Based on size, plastic waste is broadly categorized into three main types: microplastics (MPs), macroplastics, and megaplastics. Among these, macro- and megaplastics are widely used in applications such as packaging, footwear, and household products. Plastics are widely recognized as a major contributor to environmental pollution. Plastic waste can be classified into two categories: primary and secondary. Primary plastics retain their original form upon collection and include items such as bottle caps, cigarette butts, and microbeads. Secondary plastics result from the fragmentation and degradation of larger plastic materials over time, breaking down into smaller pieces. The primary sources of plastic waste are industrial, domestic, medical, agricultural, and electrical sectors. The chapter presents a comprehensive overview of each of the sources and categories of plastic waste, the main sources of its generation and resulting environmental pollution. Additionally, the chapter explains the environmental persistence of plastic litter and its harmful impacts on both terrestrial and marine environments, along with potential strategies for effective mitigation.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.