Topic
- Drinking water 5
- Irrigation 5
- Water-supply 5
- Foreign relations 4
- Water quality 4
- Agriculture and state 3
- Education 3
- Gross national product 3
- Imports 3
- International Monetary Fund 3
- Population 3
- Reservoirs 3
- Water--Purification 3
- Drainage 2
- Employment 2
- European Economic Community 2
- Filters and filtration 2
- Health 2
- International regimes 2
- Labor 2