Iron mines and mining Environmental aspects 5 Fer 5 Mines et extraction 5 Economic conditions 4 Law and legislation 4 History 3 more ... Iron ores 3 Pollution 3 Social conditions 3 Taconite 3 Water 3 Coal mines and mining 2 Economic history 2 Factory and trade waste 2 Industrialization 2 Social aspects 2 Aspect de l'environnement 1 Cities and towns 1 Copper miners 1 Finance 1 Finnish Americans 1 Iron miners 1 Iron mining 1 Labor unions 1 Land grants 1 Land tenure 1 Minerais 1 Mineral industries 1 Miners 1 less ...