Related by context. Frequent words. (Click for all words.) 53 Asarco 48 smelter 44 Peabody Energy 44 Phelps Dodge 43 smelting 42 Noranda 42 Arch Coal 41 DEQ 41 Ameren 41 smelters 41 ArcelorMittal 40 Grupo Mexico 40 Holcim 40 Massey Energy 39 Cemex 39 Teck Cominco 39 Codelco 39 MoDOT 39 mines 38 coal mines 38 AK Steel 38 Mine 38 Coal 38 Alcoa 37 manganese 37 Nalco 37 Domtar 37 Newmont 37 mining 37 copper 37 Novelis 37 MSHA 37 Allied Waste 37 zinc 37 AngloGold Ashanti 36 Bemis 36 Environmental Protection Agency 36 EPA 36 Nucor 36 AmerenUE 36 mine 36 Lafarge 35 Cameco 35 O'Fallon 35 steel mill 35 IDOT 35 Alcan 35 Steel Dynamics 35 TCEQ 35 Esmark 35 DuPont 35 Caterpillar 35 WR Grace 34 Xcel Energy 34 United Steelworkers 34 NIPSCO 34 Placer Dome 34 coal mining 34 Freeport McMoRan 34 St. Louis 34 Exelon 34 CVRD 34 metallurgical 34 Tata Steel 34 Smithfield Foods 33 Xstrata 33 molybdenum 33 Mittal Steel 33 AngloGold 33 Falconbridge 33 Chalco 33 Joplin 33 Mining 33 Iron Ore 33 Inco 33 coal mine 33 Agriprocessors 33 Barrick 33 TransAlta 33 Goldcorp 33 Appalachian Power 33 Collinsville 33 CEMEX 33 coal fired 33 Sago Mine 33 mill 33 ADOT 33 Powder River Basin 32 Severstal 32 AbitibiBowater 32 coal 32 Pilgrim Pride 32 CONSOL Energy 32 Barrick Gold Corp. 32 AEP 32 Aluminum 32 Alpha Natural Resources 32 Allegheny Energy 32 Solutia 32 steel mills 32 Barrick Gold