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Antarctic Ocean
19
Drinking water
6
Endangered species
6
Marine animals
6
Marine environment
6
Sea fishing
6
Sea ice
6
Water supply
6
Water treatment
6
Antarctic regions
5
Scientific cooperation
5
Air pollution
3
Animal behaviour
3
Animal migration
3
Deserts
3
Glaciology
3
Global commons
3
International Whaling Commission
3
International instruments
3
Marine ecosystems
3
Marine fish
3
Natural heritage
3
Nature conservation
3
Ocean exploration
3
Ocean floor
3
Sea water
3
Water storage
3
Wildlife conservation
3
Atmosphere
2
Climate change
2
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