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*SEA ICE
ARCTIC OCEAN
3
CLIMATE
3
Ice and Permafrost
3
Snow
3
*ARCTIC REGIONS
2
CONGRESS
2
CONTINENTAL SHELVES
2
NATIONAL SECURITY
2
*ENVIRONMENTAL PROTECTION
1
*OCEAN ENVIRONMENTS
1
*PERMAFROST
1
ALASKA
1
ARCTIC REGIONS
1
ARCTIC SEA ICE
1
CANADA
1
COASTAL REGIONS
1
DENMARK
1
ENVIRONMENTAL IMPACT
1
GASES
1
GLOBAL
1
GREENLAND
1
Government and Political Science
1
HEATING
1
INTERNATIONAL
1
MELTING
1
MERCHANT VESSELS
1
MINERALS
1
NORWAY
1
OIL SPILLS
1
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