Give geographical reasons:
Iron and steel industries are found in mineral rich area of Dhanbad.
Important raw materials used in iron and steel industry are iron-ore, limestone, dolomite, manganese and coal. All these raw materials are heavy, bulky and weight-losing. The cost of transportation of these materials are very high. Dhanbad and its surrounding areas are the major iron-ore and coal producing areas. Since this industry is using weight-losing raw materials which are available around Dhanbad, iron and steel industry is found at Dhanbad.