This thesis aims to investigate the impact of knowledge about microplastics and their toxicity on changes in public awareness and government policies in the 21st century. The research centers on...Show moreThis thesis aims to investigate the impact of knowledge about microplastics and their toxicity on changes in public awareness and government policies in the 21st century. The research centers on the United States due to its significant historical involvement in the chemical industry and current status as a major plastic producer. The study spans from the early 20th century to the present, offering a unique historical perspective. This research holds historical significance as it addresses a relatively unexplored area of microplastics in the context of historical analysis. Unlike most studies that concentrate on specific cases, this research provides a comprehensive view of how the American population and government have responded to plastics and their associated risks over the course of more than a century.Show less
