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*ARCTIC REGIONS
7
CONTINENTAL SHELVES
6
CANADA
5
NATIONAL SECURITY
5
*SEA ICE
4
ARCTIC OCEAN
4
CLIMATE
4
DENMARK
4
Government and Political Science
4
Ice and Permafrost
4
MINERALS
4
NORWAY
4
RUSSIA
4
SHIPPING
4
Snow
4
*GEOPOLITICS
3
*UNITED STATES GOVERNMENT
3
ALASKA
3
COAST GUARD
3
CONGRESS
3
ENDANGERED SPECIES
3
Geography
3
LEGISLATION
3
MERCHANT VESSELS
3
POLLUTION
3
SEA ICE
3
SEARCH AND RESCUE
3
TERRITORIAL CLAIMS
3
*GOVERNMENT(FOREIGN)
2
CLIMATE CHANGE
2
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