History of coal mining - Wikipedia
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Coal has many important uses worldwide. The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel.
An analysis of the coal mining sector in Indonesia. This section discusses the production, export and future perspectives of Indonesia's coal industry.
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History of coal mining - Wikipedia, the free encyclopedia. Due to its abundance, coal has been mined in various parts of the world throughout history and coal mining ...
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