Subject
Coal gasification
61
Coal gasification, Underground
10
Coal gasification Environmental aspects
8
Coal liquefaction
8
Coal gasification plants
6
Energy development
5
Bituminous coal
4
Coal gasification Technological innovations
4
Carbon sequestration
3
Coal, Pulverized
3
Groundwater Pollution
3
Hydrogenation
3
Renewable energy sources Government policy
3
Biomass gasification
2
Carbon sequestration Government policy
2
Clean coal technologies
2
Coal gasification Law and legislation
2
Coal gasification Research
2
Coal gasification plants Environmental aspects
2
Coal-fired power plants Environmental aspects
2
Energy policy
2
Global warming Prevention Government policy
2
Integrated gasification combined cycle power plants
2
Parks
2
Soil pollution
2
Water Pollution
2
Anthracite coal
1
Benzene Environmental aspects
1
Carbon monoxide
1
Catalysis
1
Catalysts
1
Chaco Canyon (N.M.) Antiquities
1
Char
1
Coal
1
Coal Carbonization
1
Coal Combustion
1
Coal Desulfurization
1
Coal Desulfurization By-products
1
Coal Government policy
1
Coal Research
1
Coal Sulfur content
1
Coal gasification By-products
1
Coal gasification Costs
1
Coal gasification Dust control
1
Coal gasification Economic aspects
1
Coal gasification Government policy
1
Coal gasification Industrial applications
1
Coal gasification Technological innovations Research
1
Coal gasification Water-supply
1
Coal liquefaction By-products
1
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