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Topic
- Water quality 31
- Contamination of environment 11
- Bureaucracy 8
- Technology 8
- Water consumption 8
- Agriculture 7
- Groundwater 6
- Politics and government 6
- Saline water conversion 4
- Sewage 4
- Water-supply 4
- Irrigation 3
- Wells 3
- Arabah Valley (Israel and Jordan) 2
- Fishing 2
- Galilee (Israel) 2
- Hydrology 2
- Meḳorot (Tel Aviv, Israel) 2
- Sewage--Purification 2
- Sewerage 2