OZONEHOLE
| Date | Clue |
|---|---|
| 2024-01-28 | Climate issue addressed in the Montreal Protocol |
| 2017-02-20 | Seasonal thinning in the atmosphere over Antarctica |
| 2016-08-27 | Opening for an E.P.A. worker? |
| 2015-05-29 | Atmospheric problem |
| 2008-05-10 | Antarctic environmental concern |
| 2008-02-08 | Opening on an environmentalist's agenda? |
| 2005-09-15 | Problem linked to CFC's |