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Environmental protection
48
Natural resources
48
International law
41
Sovereignty -- Arctic regions
40
Endangered species -- Arctic regions
36
Energy
20
Military operations -- Arctic regions
17
Animals
14
Natural gas
14
Petroleum
14
Defense policy
7
Minerals
7
Mines and mineral resources
6
Endangered species - Arctic regions
5
Military operations - Arctic regions
5
Sovereignty - Arctic regions
5
*ARCTIC REGIONS
4
*UNITED STATES GOVERNMENT
4
COAST GUARD
4
ENDANGERED SPECIES
4
Government and Political Science
4
SEARCH AND RESCUE
4
SHIPPING
4
TERRITORIAL CLAIMS
4
*GEOPOLITICS
3
*GOVERNMENT(FOREIGN)
3
CANADA
3
CRUDE OIL
3
Geography
3
INDIGENOUS POPULATION
3
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