Answer: Asansol
Notes: Asansol in Bengal is called the ‘city of mines’ (sometimes also as the Land of Black Diamond) as its land is blessed by nature’s charismatic gift to mankind in the form of most usable fossil fuel coal. Tata Steel, Bharat Coking Coal Limited (BCCL), Eastern Coalfields Limited (ECL) and Indian Iron and Steel Company (IISCO) are some of the companies who operate coal mines in the district.
