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Subject
- Ecological zones[remove]11
- Environment11
- Boundaries9
- Biology and Ecology6
- Land use, Rural6
- Agriculture5
- Farming5
- Biogeography4
- Biotic communities3
- Cities and towns3
- Farmland3
- Grazing3
- Land use, Urban3
- Metropolitan areas3
- Natural areas3
- Biodiversity2
- Conservation of natural resources2
- Endangered plants2
- Endangered species2
- Inland Waters2