Air pollution
The crossword clue "Air pollution" is answered by SMOG, a 4-letter entry. Used 130 times across 33 distinct years; most recently in 2026. It appears in 20 publications in the xd corpus. Every figure on this page comes from the pilot data itself.
The answer
SMOG
4 letters. See every clue for this answer on the SMOG answer page.
Used 130 times across 33 distinct years; most recently in 2026. It appears in 20 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other answers for this clue
The same clue has also been answered these ways in the xd corpus. Answers inside this pilot link to their own answer page.
- SMAZE (6 uses in xd)
- REEK (1 uses in xd)
Other clues for SMOG
Every other clue in this pilot answered by SMOG, most used first.
- Urban haze - used 107 times, most recently in 2026
Related clues
Pilot clues of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Air freshener target - ODOR, used 76 times
Search this clue pilot
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