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- Northwest, Pacific 7
- Photography 7
- Bodies of water 5
- Rivers 5
- Conservation of natural resources 2
- History 2
- Maps 2
- Nature 2
- Renewable energy sources 2
- Salmon industry 2
- Salmon 2
- Seining 2
- Travel 2
- Water-power 2
- Agriculture 1
- Dams 1
- Electric power production 1
- Fisheries 1
- Fishwheels 1
- Forests and forestry 1
