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Subject
- Water-supply[remove]48
- Water resources development21
- Climatic changes13
- Drinking water7
- United States. Army. Corps of Engineers5
- United States. Bureau of Reclamation5
- Federal aid to water resources development4
- Global warming4
- Water reuse4
- Watershed management4
- Sewage disposal plants3
- Water conservation3
- Bioterrorism2
- Chemical plants2
- Chemical terrorism2
- Drought relief2
- Droughts2
- Hydrology2
- National security2
- Public works2