what are the major concerns surrounding it?
The radioactive contamination of the Arctic Ocean from Russian radioactive waste dump sites in the Kara Sea Cold War nuclear test sites such as Novaya Zemlya.
Arctic Ocean
Other environmental concerns relate to the radioactive contamination of the Arctic Ocean from, for example, Russian radioactive waste dump sites in the Kara Sea Cold War nuclear test sites such as Novaya Zemlya, Camp Century's contaminants in Greenland, or radioactive contamination from Fukushima.

where did the polar bear live with her family Within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. what is its food? Its diet primarily consists of ringed and bearded seals. is it flexible with food? Yes, they also eat muskox, reindeer, and even plants like berries, roots, and kelp. is it used a mascot? Yes, it is seen on the Canadian two-dollar coin, vehicle licence plates in the Northwest Territories in Canada, and it is the mascot of Bowdoin College, Maine. is there any peculiar phenomenon related to sun in the circle where these animals are found? Yes, the midnight sun - the centre of the sun is visible at local midnight, and polar night - the centre is not visible at local noon. is the area inhabited by humans? Yes, only four million people live here, indigenous people make up 10%. what are the major underwater features of the ocean? The Lomonosov Ridge underwater divides  the deep sea North Polar Basin into the Eurasian Basin and the Amerasian Basin.
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Arctic Ocean [SEP] Other concerns
Other environmental concerns relate to the radioactive contamination of the Arctic Ocean from, for example, Russian radioactive waste dump sites in the Kara Sea Cold War nuclear test sites such as Novaya Zemlya, Camp Century's contaminants in Greenland, or radioactive contamination from Fukushima. On 16 July 2015, five nations (United States, Russia, Canada, Norway, Denmark/Greenland) signed a declaration committing to keep their fishing vessels out of a 1.1 million square mile zone in the central Arctic Ocean near the North Pole. The agreement calls for those nations to refrain from fishing there until there is better scientific knowledge about the marine resources and until a regulatory system is in place to protect those resources.