| Clue | Source | Date |
|---|---|---|
| Marvin Gaye classic subtitled "The Ecology" | LA Times Daily | 11 Feb 2018 |
| Marvin Gaye classic subtitled 'The Ecology' | The Washington Post | 11 Feb 2018 |
| Marvin Gaye classic subtitled "The Ecology" | ||
| 1971 hit for Marvin Gaye subtitled 'The Ecology' | New York Times | 31 Oct 2016 |
| 1971 hit for Marvin Gaye subtitled "The Ecology" | ||
| 1971 Marvin Gaye hit |