Plastic pollution is so insidious that it has entered even the most sacred of places. In 2012, a seal washed ashore in Massachusetts because its stomach was inflamed by all the plastic it had swallowed; seven years later a submarine diving to the bottom of America's deepest point, the Mariana Trench, discovered a plastic bag; and as recently as March a study revealed that three out of four people have microplastics in their blood.
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