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- Water consumption 47
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- Water-supply 11
- Economics 9
- Politics and government 9
- Water quality 9
- Irrigation 7
- Groundwater 6
- Water conservation 5
- Technology 4
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- Hydrology 3
- Industries 3
- Meḳorot (Tel Aviv, Israel) 3
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- Demography 2
- Droughts 2
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- Precipitation (Meteorology) 2