Subject
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Pollution control
6
Power generation
9
Power plants
20
Power resources
1
Processing
1
Production
1
Properties
1
Pulverized fuels
1
Research and development
1
Solid waste
1
Solvent extraction
1
Standards
1
Statistics
1
Storage
1
Stream generation plants
1
Strip mining
1
Subsidies
1
Sulfur
1
Sulfur dioxide
1
Sulphur dioxide
1
Supply and demand
1
Surface water
1
Synthetic fuels
1
Taxes
1
Technology
7
Testing
2
Trace elements
2
Turbines
1
Underground mining
2
Waste
2
Waste disposal
1
Waste management
1
Waste product utilization
2
Water
1
Water pollution
1
Water pollution control
1
Wildlife
1
construction
1
nitrous oxide
1
waste disposal
1