Related Clues:
- Dangerous blanket
- Bane for Beijing
- Obstacle to a city planner's vision?
- Industrially polluted air
- Medic's warning finally accepted on sulphur pollution
- Polluted fog
- Deep water-made cave, pit in road
- Gloom is on the up - regularly one finds pollution
- Pollutant fog
- Water-eroded cave
- Hollow in road, however, quickly covered by staff
- Smoky fog
- Pollution haze/fog
- One may descend into it, right out of window
- Pollutant haze