Related Clues:
- Upper atmosphere layer
- Gas with a penetrating odor
- UV filterer
- Certain atmospheric layer
- Stratospheric gas
- UV stopper
- Radiation reducer
- Atmospheric gas
- Low-level pollution or high-level protection
- Certain atmospheric gas
- Form of oxygen with a sharp odor
- Hole site
- Environmentalists' concern
- Atmospheric layer of note
- Layer in the news