Since plastic is a compound mainly composed of carbon and hydrogen, it burns, but since petroleum, which is the raw material of plastic, is a fossil fuel, carbon dioxide generated after burning increases in the atmosphere, which causes global warming. In addition, improperly treated plastic waste can affect marine life by flowing directly into the ocean or from rivers into the ocean. The problem of marine plastic waste is large, and in addition to the problems associated with conventional scattered waste, it spoils the landscape, and is also concerned about the impact on the fishery and tourism industries due to the ingestion of marine organisms. In addition, harmful substances contained in plastics are eluted, and harmful substances adhere to microplastics, and eating the fish may have an impact on human health.