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ARCTIC OCEAN
4
*ARCTIC REGIONS
3
*SEA ICE
3
CLIMATE
3
CONGRESS
3
CONTINENTAL SHELVES
3
Ice and Permafrost
3
NATIONAL SECURITY
3
Snow
3
ALASKA
2
CANADA
2
DENMARK
2
GASES
2
GLOBAL
2
GREENLAND
2
MERCHANT VESSELS
2
MINERALS
2
NORWAY
2
POLLUTION
2
RISK
2
RUSSIA
2
SHORES
2
TEMPERATURE
2
UNITED STATES
2
WATER
2
*CLIMATE
1
*ENVIRONMENTAL PROTECTION
1
*INDIGENOUS POPULATION
1
*OCEAN ENVIRONMENTS
1
*PERMAFROST
1
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