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Millions of tons of ocean plastic have gone missing

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Ocean plasticFor a decade or more, scientists have assumed our seas carry millions of tons of plastic, much of which should be floating in open water, forming vast midocean "gyres" — islands of man-made mess such as the Great Pacific Garbage Patch. But according to a new study, something more worrying is happening to 99 percent of the ocean's plastic: it's disappearing.

The study outlines the findings of scientists who trawled the waters around five large ocean gyres in 2010 and 2011. The data they obtained put them far short of the expected amount of plastic in the ocean — rather than millions of tons, the global load of ocean plastic was calculated at 40,000 tons at most. Carlos Duarte, an oceanographer at the University of Western Australia and co-author of the study, said that the findings mean we "can't account for 99 percent of the plastic that we have in the ocean."

Most of the ocean's plastic is expected to be microscopic in size, after having been broken down by the action of waves and radiation from the sun, but the scientists behind the study used very fine mesh nets that should have been able to pick up even these minuscule fragments. Instead, scientists have to consider other destinations for our garbage. Duarte thinks the missing millions of tons could be entering the stomachs of marine animals.

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