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Impact of Microplastics on AquaticOrganisms and Human Health: A Review
Summary
This review examines how microplastics from degraded plastic debris accumulate in aquatic environments, are ingested by organisms at all levels of the food chain, and may transfer to humans through seafood. The evidence warrants concern about microplastic contamination as an emerging public health issue.
Since the development of commercially viable plastic in the 1950s, plastics have become an increasingly important packaging option worldwide. Unfortunately, these materials are increasingly under environmental scrutiny. Larger plastic debris slowly degrades into small fragments with various sizes ranging from meter to micrometer due to changing environmental conditions. Microplastics are a complex class of heavily modified, synthetic organic particulates, which contaminate a wide range of environments. They are a cause for concern because their size range mimics the prey size ingested by the aquatic organisms and these ingested microplastics can be potentially transferred to the higher predators. Recent studies have confirmed the ingestion of microplastics in commercially important fishes, which is ultimately consumed by humans. Thus, massive efforts are required to investigate the distribution and abundance of microplastics in the ocean, and in considering strategies to reduce the problem. Research is urgently needed, especially regarding the potential exposure and associated human health risk to micro and nano-sized plastics.
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