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Chemical Impact: Microplastic pollution more complex than we think, says new research


Credit Kelly House / Bridge Michigan
Microplastic pollution has been building up in the Great Lakes for at least four decades, but our understanding of its impact on fish and other aquatic creatures is only just catching up.
Now new research from the University of Toronto shows the harm to wildlife is due to a wide range of factors that is not generally considered in toxicology testing – the plastics’ size, shape and chemical makeup.
In particular, it shows larval fathead minnows exposed to microplastics collected from Lake Ontario developed almost six times more deformities compared to when they were exposed ‘pristine’ pre-consumer microplastics. This suggests microplastics in the lake soak up contaminants in the water and that it is these chemicals that are causing deformities. ....

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Premature or precautionary? California is first to tackle microplastics in drinking water


RACHEL BECKER
CalMatters
California is poised to issue the world’s first guidelines for microplastics in drinking water despite no data on how plentiful they are in the state, no scientific agreement on how to test water for them and little research on their health risks. 
The pieces of plastic — smaller than an ant, some so tiny they can be seen only with a microscope — have contaminated wildlife and human bodies through their food, air and water.
Under a 2018 state law, California must require four years of testing for microplastics in drinking water, and the state must consider guidelines to help water providers and consumers determine what levels may be safe to drink. ....

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