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In German "Kohle" means coal, and "Kohlenstoff" is carbon. It's not the same word.

(But carbon monoxide is "Kohlenmonoxid")

But "Kohlenstoffmonoxid" is the actual correct term. https://de.wikipedia.org/wiki/Kohlenstoffmonoxid

"Kullos" = "coal fumes" is a term for carbon monoxide in Norwegian.