We are mainly exposed to microplastics by using various plastic products (i.e., plastic packaging containers, decomposing plastic materials, fishing nets, textiles, and personal hygiene products) and being exposed to paint fragments (e.g., abrasion of paint) that have flowed into the environment (i.e., air, water, seawater, or soil). As such, humans can be exposed to microplastics through direct ingestion, direct contact, and inhalation.
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