| Answer | Crossword Clue |
|---|---|
| ECOL | Earth Day sci. |
| ECOL | Earth sci. |
| GEOL | Earth sci. |
| GEOG | Earth sci. |
| ECOL | Earth-friendly sci. |
| GEOL | An earth sci. |
| GEOG | An earth sci. |
| TERRA | Earth, in sci-fi |
| NOTOF | ".. This Earth" (sci-fi film) |
| NOTOF | "... This Earth": sci-fi film |
| TERRA | Earth, in sci-fi fare |
| TERRA | Earth, in sci-fi tales |
| TERRA | Earth, in sci-fi stories |
| GEOL | Sci. of earth and rocks |
| THIS | ".. Island Earth": 1955 sci-fi film |
| NOTOF | .... This Earth: 1957 sci-fi film |
| METEOR | Earth threat in some sci-fi films |
