Topic
- International regimes 7
- Soils 7
- Technology 7
- Economic development 6
- Finance 6
- Maps 6
- Bureaucracy 5
- Population 5
- Reservoirs 5
- Water diversion 5
- Evapotranspiration 4
- Land tenure 4
- Natural resources 4
- Natural resources--Management 4
- Water quality 4
- Armed Forces 3
- Biqāʻ Valley (Lebanon) 3
- Electricity 3
- Geology 3
- Lebanon 3