Microplastics can be transported through atmospheric deposition

Discarded fishing line and nets and degradation of paint from vessels contribute to microplastic formation

Macroplastic trash may wash into the ocean, then break up into smaller and smaller pieces, which become microplastics

Industrial air emissions may contain microplastics

Manufacturing of primary microplastics such as nurdles to produce macroplastics can result in the release of microplastics to the environment

Microplastics can be released through wastewater outfalls and be transported by water

Microplastics can be released through wastewater outfalls and be transported by water

Aquatic organisms ingest microplastics, which can result in trophic transfer

Microplastics are generated through typical tire wear and breakdown of roadway materials

Microplastics may be present in agricultural lands due to direct application of fertilizer pellets, biosolids from wastewater treatment plants, or breakdown of plastic sheeting

Microplastics are generated by the breakdown of singe use plastics

Microplastics can be generated through the breakdown of rubberized play surfaces and plastic playground equipment or rubber mulch

Microplastics may be present in household products such as toothpaste or facial cleaners. Microplastics can be generated through household activities such as laundering of clothing

Microplastics have been found in snow on high mountain peaks

Microplastics are found in groundwater

Landfilling of macroplastics can lead to generation of microplastics

Microplastics are found in stormwater runoff