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What the other commenter is alluding to is that, if this comes into widespread use, it won't just be a moderate amount. We produce mind-boggling amounts of plastic waste and a lot of it would concentrate in rivers and estuaries.

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These would not break down into the kinds of nutrients that cause algal blooms and dead zones. That is cause by nitrogen and phosphorus runoff.

That's interesting. I didn't have access to the paper, just the abstract, so didn't know it was different.

It will be a moderate amount compared to the amounts that produce dead zones.

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