Related Clues:
- Big road coming on to little one -- potential hazard for motorist?
- Watery vapour
- Hazy pollution
- London weather phenomenon, stereotypically
- Heavy mist
- Some regularly flee rising pollution
- Clean Air Act concern
- L.A. or Houston problem
- Beijing skyline haze
- Vision impairer
- Bad big city air
- Business mogul conceals air pollution
- Filthy air
- Certain pollutant
- Mexico City problem