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In page Pollution in the Arctic Ocean:

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Pollution in the Arctic Ocean is primarily the result of economic activities carried out on land, which is sources from locally, regionally, and globally origins.[1] There is also the inclusion of industrial development in the Arctic region, northern rivers, and the effects of military activities, particularly nuclear activity – as well as the influx of pollutants from other regions of the world.[citation needed]However, the Arctic Ocean remains relatively clean compared to other marine regions of the world.