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*ARCTIC REGIONS
*SEA ICE
2
ARCTIC OCEAN
2
CLIMATE
2
CONTINENTAL SHELVES
2
Ice and Permafrost
Snow
2
*OCEAN ENVIRONMENTS
1
*PERMAFROST
1
ALASKA
1
CANADA
1
COASTAL REGIONS
1
CONGRESS
1
DENMARK
1
GASES
1
GLOBAL
1
GREENLAND
1
HEATING
1
INTERNATIONAL
1
MELTING
1
MERCHANT VESSELS
1
MINERALS
1
NATIONAL SECURITY
1
NORWAY
1
OIL SPILLS
1
POLLUTION
1
RISK
1
RUSSIA
1
SEASONS
1
SHIPPING
1
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