Which statement best describes the origin of microplastics?

Which statement best describes the origin of microplastics?

• A. From breakdown of larger plastics or microbeads
• B. They originate only from natural materials
• C. They readily biodegrade in the environment
• D. They are entirely removed by standard wastewater treatment

Answer: (C)

Microplastics mainly come from the breakdown of larger plastic items and from microbeads used in some products. Over time, sunlight, heat, and physical wear fragment bottles, bags, fishing gear, and similar plastics into tiny particles. Microbeads, tiny plastic spheres once common in cosmetics and exfoliants, also enter waterways directly. These particles are plastics, so they’re not natural materials, and they don’t readily biodegrade in the environment—most plastics persist for a long time. While wastewater treatment can remove some microplastics, it doesn’t catch all of them, so many still reach rivers, lakes, and oceans.