Related Clues:
- Houston problem
- Horizon hider
- Kind of trail
- Try writing about pollution
- Factor in an air quality rating
- Pollution - 24 down!
- Man welcomes in extremists? It's not clear
- Air pollution first to suffocate Tiddles
- Man-made atmospheric pollution
- Bad visibility caused by emissions from chimneys
- Polluted mist
- Polluted atmosphere
- Visibility hamperer
- Unpleasant blanket
- Unwanted cloud