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Subject
- Boundaries[remove]24
- Society12
- Environment10
- Housing6
- Agriculture5
- Ecological zones5
- Farming5
- Income5
- Economy4
- Land use, Rural4
- Administrative and political divisions3
- Cities and towns3
- Employment3
- Farmland3
- Grazing3
- Poverty3
- Air quality management2
- Air quality—Standards2
- Biology and Ecology2
- Climatology, Meteorology and Atmosphere2