Henning Weigand-Plastic pollution in oceans and on land

Since the ocean is downstream from nearly every terrestrial location, it is the receiving body for much of the plastic waste generated on land. Several million tons of debris end up in the world’s oceans every year, and much of it is improperly discarded plastic litter. The first oceanographic study to examine the amount of near-surface plastic debris in the world’s oceans was published in 2014. It estimated that at least 5.25 trillion individual plastic particles weighing roughly 244,000 metric tons (269,000 short tons) were floating on or near the surface. A 2021 study determined that 44 percent of plastic debris in rivers and oceans, and on shorelines, was made up of bags, bottles, and items related to takeout meals. Plastic pollution was first noticed in the ocean by scientists carrying out plankton studies in the late 1960s and early 1970s, and oceans and beaches still receive most of the attention of those studying and working to abate plastic pollution. Floating plastic waste has been shown to accumulate in five subtropical gyres that cover 40 percent of the world’s oceans. Located at Earth’s midlatitudes, these gyres include the North and South Pacific Subtropical Gyres, whose eastern “garbage patches” (zones with high concentrations of plastic waste circulating near the ocean surface) have garnered the attention of scientists and the media. The other gyres are the North and South Atlantic Subtropical Gyres and the Indian Ocean Subtropical Gyre. By Henning Weigand

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