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The largest ocean-based source of plastic pollution is discarded fishing gear (including traps and nets), estimated to be up to 90% of plastic debris in some areas. [56] [57] Continental plastic litter enters the ocean largely through storm-water runoff, flowing into watercourses or directly discharged into coastal waters. [58]
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[1] [2] As of 2022, an estimated 51 trillion microplastics are floating in the surface water of the world's oceans. [3] A single 5mm piece of plastic can host 1,000s of different microbial species. [4] Some marine bacteria can break down plastic polymers and use the carbon as a source of energy. Microbes interacting with the surface of plastics.
In 2020, over the course of two expeditions, Ocean Voyages Institute again set the record for the largest cleanup removing 170 short tons (150 t; 340,000 lb) of plastic from the ocean. The first 45-day expedition removed 103 short tons (93 t; 206,000 lb) of plastic [ 73 ] and the second expedition removed 67 short tons (61 t) of plastic from ...
Discarded plastic bags, six-pack rings, cigarette butts and other forms of plastic waste which finish up in the ocean present dangers to wildlife and fisheries. [53] Aquatic life can be threatened through entanglement, suffocation, and ingestion. [54] [55] [56] Fishing nets, usually made of plastic, can be left or lost in the ocean by fishermen.
The United States National Academy of Sciences estimated in 2022 that the worldwide entry of plastic into the ocean was 8 million metric tons of plastic per year. [63] A 2021 study by The Ocean Cleanup estimated that rivers convey between 0.8 and 2.7 million metric tons of plastic into the ocean, and ranked these river's countries. The top ten ...
Debris on beach near Dar es Salaam, Tanzania Debris collected from beaches on Tern Island in the French Frigate Shoals over one month. Researchers classify debris as either land- or ocean-based; in 1991, the United Nations Joint Group of Experts on the Scientific Aspects of Marine Pollution estimated that up to 80% of the pollution was land-based, [5] with the remaining 20% originating from ...
The South Pacific garbage patch is an area of ocean with increased levels of marine debris and plastic particle pollution, within the ocean's pelagic zone. This area is in the South Pacific Gyre , which itself spans from waters east of Australia to the South American continent, as far north as the Equator , and south until reaching the ...