Related Clues:
- Beijing skyline haze
- Bad big city air
- Business mogul conceals air pollution
- Filthy air
- Great! First three reversing motorists may go down here briefly
- Certain pollutant
- Mexico City problem
- Unhealthy air component
- Delhi problem
- Airborne urban hazard
- Damage to road
- Urban irritant
- Fog and smoke mix
- Alert subject?
- Asthmatic's bane