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Subject
- Biology and Ecology[remove]6
- Ecological zones[remove]6
- Environment6
- Biogeography4
- Boundaries4
- Biotic communities3
- Natural areas3
- Agriculture2
- Biodiversity2
- Conservation of natural resources2
- Endangered plants2
- Endangered species2
- Farming2
- Farmland2
- Grazing2
- Inland Waters2
- Land use, Rural2
- Wilderness areas2
- Bodies of water1
- Cities and towns1