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The two main methods used for coal extraction are surface mining and underground mining. The methods used to extract coal depend on the geology of the coal deposits.
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Coal is a fossil fuel that''s burned to generate electricity and heat, or liquefied to produce gas and diesel fuel. Coal begins as plant matter that''s trapped ...
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Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content, and, since the 1880s, has been widely used to generate electricity.
The story of British coal mining told through BBC radio and TV broadcasts from the last 70 years, with a gallery of images from the 1930s.
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Iron ores are rocks and minerals from which tinny iron can be inexpensively extracted. The ores are typically rich in iron oxides and vary in color from dark grey ...
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