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Topic
- Refugees 26
- Politics and government 15
- Irrigation 13
- Demography 10
- Building 9
- Negotiation 8
- United Nations 8
- International regimes 7
- Resource allocation 7
- Water-power 7
- Groundwater 6
- Hydrology 6
- Economics 5
- Finance 5
- Water diversion 5
- Agriculture 4
- Water--Storage 4
- Armed Forces 3
- Canals 3
- Dams 3
