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Clarification.
Charcoal pencils are used in [[sketching]].
Charcoal pencils are used in [[sketching]].
Charcoal is useful for reducing metallic oxides to the metal itself, because it can chemically combine with the oxygen in the metal oxide and turn into a gas (carbon dioxide), which escapes. This has been the method by which many elements were isolated. The same process, with another form of carbon ("coke"), is used at an industrial level, for example, in making [[steel]].
Charcoal is useful for reducing metallic oxides to the metal itself, because it can chemically combine with the oxygen in the metal oxide and turn into a gas (carbon dioxide), which escapes. This has been the method by which many elements were isolated. The same process, with another form of carbon (called "coke"), is used at an industrial level, for example, in making [[steel]].
[[Category:Fuel]]
[[Category:Fuel]]