Coal has been used for centuries as a source of energy. It is the second sourse of energy produced and consumed in the world. The major producers are China, the United States, India, Australia, Russia, Indonesia and South Africa. In coal plants, two types of coal are produced,; thermal and metallurgical coal. Although the two are extracted substantially in the same way, there are significant differences in the end products and their uses. As its name suggests, the thermal coal, differing from the thermal coal in some physical aspects but also containing lower sulphur and phosphorus levels, is essential to global steelmakers.
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