Related Clues:
- Pollution finally chokes cat
- Deep cave; road damage
- Effect of subsidence, even if limited by staff
- Pollution fog
- Thursday in south coast resort means depression on the way!
- Sleeping principally beside cat — that's bad for the chest
- Cave that's deep, but found when entering shaft, perhaps
- For all that must enter east European cave
- Thick polluted mist
- Deep cave; road hazard
- Mexico City sight
- Special meeting of government leaders has impact on the environment
- Blanket produced in Mexico City
- Beijing bane
- Concern of 11-Across