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- Saline water conversion 22
- Technology 18
- Irrigation 10
- Agriculture 8
- Economics 7
- Water quality 7
- Bureaucracy 4
- Groundwater 4
- Water consumption 4
- Reverse osmosis 3
- Sewage--Purification 3
- Brackish waters 2
- Building 2
- Hydrology 2
- Meḳorot (Tel Aviv, Israel) 2
- Rain-making 2
- Sewage 2
- Water--Purification--Distillation process 2
- Aquifers 1
- Armed Forces 1
