Compared to the North Sea and Atlantic Ocean, with what problem must the Mediterranean, Baltic, and Black seas contend?

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The Mediterranean, Baltic, and Black seas have limited exchange of water with the open ocean, making it harder for them to disperse pollutants. This results in a greater challenge in cleansing themselves of pollutants compared to areas like the North Sea and Atlantic Ocean, which have more direct and larger exchanges of water with the global ocean system.

Compared to the North Sea and Atlantic Ocean, with What