| Clue | Source | Date |
|---|---|---|
| Environmental catastrophes | The Washington Post | 04 Aug 2021 |
| Environmental catastrophes | LA Times Daily | 04 Aug 2021 |
| Coastal disasters | Universal | 28 Jun 2020 |
| Causes of slicks | USA Today | 11 Jan 2017 |
| Causes of slicks | ||
| Environmental woes | ||
| Makes drugs easier to swallow? | ||
| Tanker disasters | ||
| Slick sources |