OZONELAYER
| Date | Clue |
|---|---|
| 2016-01-15 | Chlorofluorocarbons damage it |
| 2015-11-05 | It's found all around the world |
| 2004-03-09 | Atmospheric region with a "hole" |
| 1999-08-20 | Covering with a hole in it |
| 1996-09-26 | Purportedly weakening shield |
| Date | Clue |
|---|---|
| 2016-01-15 | Chlorofluorocarbons damage it |
| 2015-11-05 | It's found all around the world |
| 2004-03-09 | Atmospheric region with a "hole" |
| 1999-08-20 | Covering with a hole in it |
| 1996-09-26 | Purportedly weakening shield |