Crossword Genius

Element produced by fossil fuels (6)

Ross

I believe the answer is:

carbon

(Other definitions for carbon that I've seen before include "Element in soot, charcoal, etc" , "This paper is used to make copies" , "Element in pollutant" , "Chemical element occurring in pure form in diamond" , "Substance" .)

I've seen this clue in The Irish Times.
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