Related Clues:
- Air quality index concern
- Atmospheric pollutant
- Pollution that reduces visibility
- Intrusive weather
- Clip of tree nut in Cloud
- Smelly city air
- Smoke/fog mix
- Result of pollution
- Metropolitan menace
- Mist or steam
- Overhead cost of manufacturing?
- Air pollution common in big cities
- Dangerous Beijing blanket
- Haze in cities
- City hazard