Subject
Greenhouse gas mitigation
10
Emissions trading
7
Appropriations and expenditures
6
Oil spills Law and legislation
6
Carbon taxes
5
Environmental policy
5
Water Pollution
5
Greenhouse gases Government policy
4
Infrastructure (Economics)
4
Liability for oil pollution damages
4
BP Deepwater Horizon Explosion and Oil Spill, 2010
3
Energy policy
3
Federal aid to water quality management
3
Water quality management Economic aspects
3
Water quality management Finance
3
Water resources development
3
Carbon dioxide mitigation
2
Carbon dioxide mitigation Government policy
2
Clean energy
2
Climatic changes Economic aspects
2
Electric power production
2
Environmental impact charges
2
Environmental protection
2
Federal aid to water resources development
2
Fossil fuel power plants Government policy
2
Greenhouse gas mitigation Government policy
2
Greenhouse gases
2
Oil spills Claims
2
Oil spills Economic aspects
2
Oil spills Prevention
2
Power-plants Law and legislation
2
Restoration ecology
2
Sewage
2
Sewage Purification Finance
2
Water quality management
2
Water-supply
2
Air Pollution Law and legislation
1
Carbon dioxide mitigation Economic aspects
1
Clean energy industries
1
Climatic changes
1
Climatic changes Law and legislation
1
Climatic changes Research Law and legislation
1
Coastal zone management
1
Drinking water
1
Drinking water Purification
1
Economic development
1
Electric power distribution
1
Electric power production Environmental aspects
1
Electric power production Government policy
1
Energy conservation
1
more ...