Crossword puzzle clue "big city pollution problem"

Here are the possible solutions for big city pollution problem clue

Answer
Clue
Relevancy
smog
Clue
Big city pollution problem
Form of air pollution over a big city
Pollution problem
Urban pollution problem
Air pollution that's a major problem in China
Air pollution problem in many large cities
industrialwaste
Clue
Pollution problem
peasoupfog
Clue
London pollution problem

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