Smog was a term for atmospheric pollution, a portmanteau of the words "smoke" and "fog" in English. (TOS episode: "Bread and Circuses")
History and specifics
As of the year 2267, the planet Neolithia had no smog. (TOS novel: Mission to Horatius)
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Appendices
References
External link
- Smog article at Memory Alpha, the wiki for canon Star Trek.