 MicroplasticMany people believe that it is an island, when it is, in fact, patches that are comprised of tiny bits of plastic called microplastics. Plastic cannot decompose; they can only break down into smaller pieces, through a process called photodegradation. Because of this, the garbage patch will remain in the ocean for a long time. |  Unknown depthSince the North Pacific Subtropical Gyre is too big, it is unknown how big the entire patch is. Another factor to remember is that not all trash floats on the surface. According to the UN Environment Program, an estimate of 46,000 pieces of plastic float every square mile of the oceans. |  Less SeafoodAs various types of debris collect on the surface, they block the sunlight from reaching plankton and algae, which are the producers of the food chain. |
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