What does the no discharge zone restricts what type of activity?

A no-discharge zone restricts the use of Type One and Two Marine Sanitation DevicesThese areas require greater environmental protection. Any sewage discharge in this area can be very harmful to the environment, including the flora and fauna of the zone.

Nation of conflicting ethnic groups

No, because you are more likely to see volcanic mountains where magma is rising along the mid-ocean ridge spreading to the center.