There are several different types of coal. Coal type is determined by carbon content, moisture content and calorific value. Steelmaking coal (or metallurgical coal) is a higher grade of coal and is used to produce coke, the primary source of carbon used in the production of steel. Steel has a major role in our lives – it is used in our cars, office towers, homes, power lines and appliances. Our quality of life would not be possible without steel production.