Topic
- Building 23
- Climate 23
- Yarmuk River 21
- Water consumption 17
- Aquifers 15
- Palestinian Arabs 14
- Negotiation 13
- Refugees 13
- Canals 11
- Occupied territories 11
- United Nations 11
- Religion 10
- Tiberias, Lake (Israel) 10
- Wars 10
- Soils 9
- Water--Storage 9
- Peace 8
- Political parties 8
- Population 8
- Sewage 8