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- Gypsum 3
- Water quality 3
- Agriculture 2
- Arid regions 1
- Black Sea 1
- Dead Sea (Israel and Jordan) 1
- Drainage 1
- Irrigation 1
- Mediterranean Sea 1
- Salinity 1
- Soil conservation 1
- Soils 1
- United Arab Republic 1
- Water diversion 1
- Waterlogging (Soils) 1
- Watersheds 1
