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Topic
- Water-supply 60
- Irrigation 21
- Politics and government 16
- Agriculture 12
- Economics 12
- Groundwater 11
- Demography 10
- Technology 10
- Water quality 10
- Dams 9
- Hydrology 7
- Water consumption 7
- Bureaucracy 6
- Finance 6
- International regimes 6
- Drinking water 5
- Building 4
- Population 4
- Resource allocation 4
- Aquifers 3
