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I've just been thinking a fair deal about ocean plastic and the ocean clean-up project. Is there something in saline water that changes the chemical composition of most plastics to make them pretty unusable in recycling or is there something else that makes ocean plastic overall a lost cause for recycling?

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    $\begingroup$ You have some mechanical stress and more importantly the plastic is "sitting" in the sun a lot of the time. Also, the challenge is not the recycling, but the collecting. $\endgroup$ – Erik Apr 17 at 12:56

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