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Subject
- Marine resources[remove]25
- Oceanography25
- Submarine geology25
- Water14
- Conservation of natural resources10
- Pollution10
- Refuse and refuse disposal10
- Toxicology10
- Waste disposal10
- Environmental aspects9
- Land use7
- Ecosystem management6
- Physical geography6
- Management4
- Chemical reactions3
- Geomorphology3
- Human biology3
- Natural resources3
- Biodiversity2
- Biotic communities2