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ARCTIC OCEAN
4
CLIMATE
*SEA ICE
3
Ice and Permafrost
3
Snow
3
*ARCTIC REGIONS
2
CANADA
2
CONGRESS
2
CONTINENTAL SHELVES
2
GREENLAND
2
MINERALS
2
NATIONAL SECURITY
2
NORWAY
2
UNITED STATES
2
(*ARCTIC REGIONS
1
*ENVIRONMENTAL PROTECTION
1
*OCEAN ENVIRONMENTS
1
*PERMAFROST
1
ALASKA
1
ARCTIC REGIONS
1
ARCTIC SEA ICE
1
ATMOSPHERICS
1
COAL
1
COASTAL REGIONS
1
DENMARK
1
ENVIRONMENTAL IMPACT
1
FINLAND
1
GASES
1
GEOGRAPHY
1
GLOBAL
1
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