Related by context. Frequent words. (Click for all words.) 65 coal 58 metallurgical coal 58 thermal coal 57 coking coal 57 lignite 55 coal seams 54 sulfur coal 53 Coal 53 coal seam 51 uranium 50 vanadium 50 ores 50 natural gas 49 coal mining 48 ore 48 uranium oxide 48 coking 48 coal mines 47 iron ore 46 shales 46 sulfur 46 coal gasification 46 Powder River Basin 45 uranium ore 45 molybdenum 45 steelmaking 45 shale 45 minerals 44 coal mine 44 metallurgical 44 soda ash 44 magnetite 44 tantalum 44 Vanadium 44 niobium 44 tungsten 43 manganese 43 coal seam gas 43 coal fired 43 alumina 43 gypsum 43 feedstock 43 limestone 42 blast furnaces 42 bauxite 42 bitumen 42 coalbed methane 42 chromite 42 potash 42 IGCC 42 hydrocarbon 42 syngas 42 hydrocarbons 41 Manganese 41 zircon 41 shale formations 41 hardwoods 41 iron ore pellets 41 mines 41 pig iron 41 Marcellus Shale 41 briquettes 41 mineral 41 geothermal 41 CNX Gas 41 gasification 41 gas 41 BTU 41 geologically 41 Iron Ore 40 flue gas 40 Iron ore 40 Marcellus shale 40 ferrous 40 gas condensate 40 iron oxide 40 Molybdenum 40 methane 40 coal miners 40 Uranium 40 Patriot Coal 40 ferrochrome 40 rare earths 40 shale gas 40 coalfields 40 wood pellets 40 oxide 39 thorium 39 liquid fuels 39 coalmine 39 Coal Mine 39 biomass 39 coal miner 39 furnaces 39 cobalt 39 steelmakers 39 slag 39 gases 39 woodchips 39 mining 39 hematite