additivesbiodegradablebioplasticburnchemicalchemicalsclassificationconsequencescontrolcpcbdarkdegradationdifferentdiseaseenvironmentexplanationfactfactsfoodgeneratellmetalsmicromultiplenaturepackagingpaperplasticpollutionplasticwastepollutionpolyethylenepopsproductspvcreasonrecyclingsaveshouldnsidesinglesizetoxictruthuseusingwastewater