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- Brackish waters 10
- Water quality 5
- Agriculture 4
- Technology 4
- Economics 3
- Groundwater 3
- Hydrology 3
- Saline water conversion 3
- Watersheds 3
- Arid regions 2
- Climate 2
- Fresh water 2
- Precipitation (Meteorology) 2
- Rain and rainfall 2
- Aquifers 1
- Building 1
- Dams 1
- Deserts 1
- Industries 1
- Irrigation 1
