It is a critical issue in the world that discarded plastic and unusable plastic are going into the world's oceans, and their pollution poses a threat to the environment and aquatic life. Now, a new study published in the journal Science, in which their studied that how much plastic humans are putting into the world's waters. Based on coastal population densities, waste-handling practices, and plastic consumption, researchers calculate that including in to 8 million metric tons of plastic trash. ( A metric ton is equivalent to 1,000 kilograms or 2,205 pounds ). Tracking all the plastic, which comes from plastic bottles and plastic bags to the tiny microbeads of plastic broken down from larger sources, are have a challenge for scientists. In the annual meeting of American Association for Advancement of the Science in San Jose, Calif., an assistant engineering professor and the study's lead author, Jenna Jambeck at the University of Georgia, she said that "Think of five bags filled with plastic for every foot of coastline in the world." Their team held up a plastic trash bag. An industrial ecologist from the University of California-Santa Barbara, whose National Center for Ecological Synthesis and Analysis orchestrated the study.
He said that “Or may be this is more surprising, on the low end of the estimate of between 4.8 and 12.7 million metric tons, the amount of plastic dumped in the ocean would be equivalent to the tonnage of tuna that fishing boats catch each year, worldwide. Another study said that, Plastic waste inputs from land into the ocean, published in the journal Science, also state that plastic debris washing into the ocean from 192 coastal countries reached somewhere between 4.8 and 12.7 million metric tons in . That is enough to cover every foot of coastline in all over the world. In 2014 there were above 8 million metric tons of plastic entering the ocean globally. The study also found that there were top five countries in the world of plastic waste were Asian countries, with a combination of disposal practices, dense coastal populations, inadequate waste collection, and rapid economic growth. The largest contributor to that mass of ocean plastic is China, China is topped in the list of plastic waste contributor, with between 1.32 million and 3.53 million metric tons of plastic yearly. Sri Lanka, Indonesia, Vietnam and, the Philippines rounded out the list. The United States ranked 20th, with between 40,000 and 110,000 metric tons of plastic waste in the world.