Related by context. Frequent words. (Click for all words.) 63 coal 54 metallurgical coal 54 thermal coal 52 coal fired 50 lignite 49 Powder River Basin 47 natural gas 47 sulfur 46 coal gasification 46 coking coal 45 sulfur dioxide emissions 45 coal seams 44 uranium ore 44 coal mines 44 voltage transmission 43 uranium 43 feedstock 43 cleaner burning 43 mercury emissions 42 vanadium 42 fossil fuels 42 Wheeling Pitt 42 fossil fuel 42 coal mining 42 megawatts 42 iron ore 42 coking 42 NOx 41 renewable 41 enriched uranium 41 alumina 41 baseload 41 syngas 41 pig iron 40 coal ash 40 flue gas 40 wood pellets 40 Coal 40 gasification 40 soda ash 39 sulfur dioxide 39 hydroelectric plants 39 steelmaking 39 emission reductions 39 ores 39 smelters 39 ore 39 biomass 39 blast furnaces 39 electric utilities 39 megawatts MW 39 nitrogen oxide 38 molybdenum 38 hydroelectric 38 low sulfur diesel 38 manganese 38 nuclear reactors 38 electricity 38 hydroelectric dams 38 yellowcake 38 smelter 38 wood chips 38 propylene 38 coal seam 38 megawatt 38 iron ore mines 37 feedstocks 37 emissions 37 ethane 37 uranium oxide 37 liquefied natural gas 37 diesel engines 37 emission 37 furnaces 37 wood stoves 37 polluting 37 uranium mines 37 nitrogen oxides 37 mercury pollution 37 boilers 37 smelting 37 ethanol 37 Btu 37 highly enriched uranium 37 incandescent bulbs 37 refineries 37 mines 37 gypsum 37 gigawatts 37 scrubbers 37 Peabody Energy 37 oil sands 37 renewable energy 37 diesel generators 36 diesels 36 thorium 36 emission reduction 36 diesel fuel 36 CFLs 36 LNG 36 Arch Coal