| http://www.w3.org/ns/prov#value | - These include the reasonably well known: entangling wildlife, or being mistaken for food; and the one that has just been discovered: the fact that floating plastics accumulate and concentrate chemicals such as polychlorinated biphenols (PCBs) and the pesticide DDT (and that these then make their way in to the food chain, affecting birds, marine mammals and, of course, humans).
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