Related Clues:
- Harmful downfall
- UV stopper
- Radiation reducer
- Atmospheric gas
- One cause of deforestation
- Low-level pollution or high-level protection
- Certain atmospheric gas
- Form of oxygen with a sharp odor
- Corrosive stuff from the sky
- They gave the Hulk his powers
- Destructive precipitation
- Hole site
- Environmentalists' concern
- Atmospheric layer of note
- Layer in the news