| Answer | Crossword Clue |
|---|---|
| ECO | Earth First prefix |
| GEO | Earth (prefix) |
| GEO | Earth: prefix |
| GEO | Earth: Prefix. |
| GEO | Earth: Prefix |
| GEA | Earth: prefix |
| GEO | Earth prefix |
| GEO | Earth-science prefix |
| ECO | Earth Day prefix |
| GEO | The earth: Prefix. |
| GEO | Prefix meaning "earth" |
| ECO | Earth-friendly prefix |
| GEO | Prefix meaning "the earth" |
| ECO | Good prefix for Earth Day |
