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Topic
- Agriculture 11
- Demography 7
- Irrigation 5
- Politics and government 4
- Economics 3
- Groundwater 3
- Watersheds 3
- Climate 2
- Droughts 2
- Hydrology 2
- International regimes 2
- Precipitation (Meteorology) 2
- Resource allocation 2
- Water-supply 2
- Aquifers 1
- Arid regions 1
- Bibliography 1
- Civil war 1
- Dams 1
- Deserts 1
