Coal was a type of rock, primarily composed of carbon, which could be used as a fossil fuel.
In 2267, the USS Enterprise detected no signs of coal being used as fuel on Neolithia, which was highly unusual as the planet was supposedly a human colony. (TOS novel: Mission to Horatius)
Coal was obtained through mining. (DS9 episode: "Bar Association")
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External links[]
- Coal article at Memory Alpha, the wiki for canon Star Trek.
- Coal article at Wikipedia, the free encyclopedia.