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- Water quality 46
- Technology 13
- Agriculture 12
- Contamination of environment 12
- Groundwater 11
- Water consumption 9
- Bureaucracy 8
- Irrigation 7
- Politics and government 7
- Hydrology 6
- Saline water conversion 5
- Sewage 4
- Tiberias (Israel) 4
- Water-supply 4
- Economics 3
- Fishing 3
- Wells 3
- Aquifers 2
- Arabah Valley (Israel and Jordan) 2
- Chlorination 2