Related by context. Frequent words. (Click for all words.) 81 coal mines 74 coal mine 72 mining 70 coal 68 coalmine 67 coal miner 67 coal miners 64 coalfields 63 colliery 61 mines 61 mine 58 Coal 57 miners 56 uranium mining 56 miner 55 mountaintop removal 55 Coal Mine 53 mountaintop removal mining 52 coalbed methane 52 Mining 51 coal seam 51 Appalachia 51 steelmaking 51 coal seams 50 coal fired 50 steelworks 49 MSHA 49 Sago Mine 49 steel mill 49 Mine Safety 48 Massey Energy 48 coal gasification 48 coking 48 uranium mines 47 smelting 47 quarrying 47 bauxite 47 iron ore mines 46 coking coal 46 steel mills 46 Mine 45 thermal coal 45 coal ash 45 Mine Workers 45 Patriot Coal 45 lignite 44 iron ore 44 Peabody Energy 44 metallurgical coal 44 shale gas 43 quarries 43 extractive 43 hydroelectric 43 quarry 43 Sago 43 mine shafts 42 Consol Energy 42 farming 42 ArcelorMittal 42 manganese 41 alumina refinery 41 coal seam gas 41 Crandall Canyon mine 41 Crandall Canyon 41 metallurgical 41 Pilbara region 41 smelter 41 Pilbara 41 bed methane 41 iron ore miner 41 Arch Coal 41 hydropower 41 Marcellus shale 40 blast furnace 40 mined 40 CBM 40 alumina 40 drilling 39 blast furnaces 39 fracking 39 drillers 39 Wheeling Pittsburgh 39 steelworker 39 steelworkers 39 trapped miners 39 smelters 39 soda ash 39 polluting industries 39 Macarthur Coal 39 forestry 39 Manchin 39 Mines 39 hydraulic fracturing 39 Shanxi province 39 W.Va. mine 39 Cleveland Cliffs 39 oil sands 39 Consol 39 methane 39 Marcellus Shale 39 Powder River Basin