| Clue | Source | Date |
|---|---|---|
| Environment-related | Eugene Sheffer | 27 Jan 2020 |
| Reactor oddly decommissioned using rationale related to the environment | ||
| Environment-related | LA Times Daily | 27 Sep 2017 |
| Environment-related | The Washington Post | 27 Sep 2017 |
| Relating to the environment | Universal | 14 Aug 2017 |
| Environment-related | ||
| Relating to the environment | ||
| Environment-related | ||
| Environment-related | ||
| Environmental | ||
| Environmental | ||
| Relating to environment |