GREENHOUSEGASES
| Date | Clue |
|---|---|
| 2017-09-02 | They leave carbon footprints |
| 2012-06-24 | Atmospheric worries |
| 2009-08-15 | "Hot" political topic |
| 2008-08-22 | "An Inconvenient Truth" topic |
| 1995-03-03 | CO2 and methane, to a ecoscientist |
| Date | Clue |
|---|---|
| 2017-09-02 | They leave carbon footprints |
| 2012-06-24 | Atmospheric worries |
| 2009-08-15 | "Hot" political topic |
| 2008-08-22 | "An Inconvenient Truth" topic |
| 1995-03-03 | CO2 and methane, to a ecoscientist |