Subject
- Pollution prevention -- Oregon2
- Coal ash -- Environmental aspects -- Oregon -- Boardman1
- Coal ash -- Environmental aspects -- Tennessee -- Roane County1
- Coal ash -- Health aspects -- Oregon -- Boardman1
- Coal ash -- Health aspects -- Tennessee -- Roane County1
- Coal ash -- Storage -- Environmental aspects -- Oregon -- Boardman1
- Coal ash -- Storage -- Environmental aspects -- Tennessee -- Roane County1
- Coal-fired power plants -- By-products -- Environmental aspects -- Oregon -- Boardman1
- Coal-fired power plants -- By-products -- Environmental aspects -- Tennessee -- Roane County1
- Coal-fired power plants -- Environmental aspects -- Oregon -- Boardman1
- Coal-fired power plants -- Environmental aspects -- Tennessee -- Roane County1
- Coal-fired power plants -- Waste disposal -- Environmental aspects -- Oregon -- Boardman1
- Coal-fired power plants -- Waste disposal -- Environmental aspects -- Tennessee -- Roane County1
- Electronic industries -- Waste disposal -- Environmental aspects -- Oregon1
- Hazardous waste site remediation -- Law and legislation -- United States1
- Hazardous waste site remediation -- Oregon1
- Hazardous waste site remediation -- Washington (State)1
- Hospitals -- Waste disposal -- Oregon1
- Radioactive pollution -- Oregon -- Boardman1
- Radioactive pollution -- Tennessee -- Roane County1