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- Bureaucracy 41
- Building 29
- Finance 26
- Irrigation 26
- Agriculture 24
- Water-supply 19
- Water quality 16
- Water consumption 15
- Water--Purification 15
- Economics 14
- Dams 13
- Drainage 13
- Canals 12
- Pipelines 12
- Drinking water 11
- Reclamation of land 10
- Sewage 9
- World Bank 8
- Jordan Valley Authority 7
- Water--Storage 7