Crossword Genius

Emissions concern

Ross

I think it could be either:

smog

soot

(Other definitions for smog that I've seen before include "Pollutant fog" , "Polluted atmosphere" , "Smokey fog" , "Thick polluted mist" , "Man-made atmospheric pollution" .)

I've seen this clue in The New York Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.