| 100% | REUSE | 5 | "Reduce, ___, Recycle" (3 R's for the environment) |
| 50% | RECYCLE | 7 | Do one's part for the environment |
| 50% | PRINCESSOFWALES | 15 | Title for the UK's Catherine: 3 wds. |
| 49% | CFC | 3 | Emission that's bad for the environment (abbr.) |
| 49% | RECYCLE | 7 | Do one's part for the environment, maybe |
| 49% | ECO | 3 | ___-friendly (safe for the environment) |
| 49% | ECO | 3 | ___-friendly (good for the environment) |
| 49% | ECO | 3 | __-friendly (good for the environment) |
| 48% | GUZZLERS | 8 | Gas-___ (cars that are bad for the environment) |
| 48% | THELORAX | 8 | Dr. Seuss book about caring for the environment |
| 48% | ECO | 3 | Prefix meaning "good for the environment" |
| 48% | ECO | 3 | Prefix implying "good for the environment" |
| 48% | ECO | 3 | Prefix suggesting "good for the environment" |
| 48% | RECYCLE | 7 | Do your bit for the environment |
| 48% | ECO | 3 | ___-friendly (not bad for the environment) |
| 48% | ECO | 3 | ___-conscious (looking out for the environment) |
| 48% | THREEHOURTOUR | 13 | 1960s sitcom setup, part 1: The S.S. Minnow set sail for a ___: 3 wds. |
| 47% | ICEAGE | 6 | Period with mammoth consequences for the environment? |
| 47% | ECO | 3 | ___-warrior (person who fights for the environment) |
| 47% | ECO | 3 | ___-friendly design (something that's good for the environment) |
| 46% | SUPERBOWLMVP | 12 | Award for the star of the NFL's biggest game: 3 wds., abbr. |
| 46% | ECO | 3 | Prefix suggesting something isn't bad for the environment |
| 46% | ONAWHIM | 7 | For the heck of it: 3 wds. |
| 46% | SSNS | 4 | ID's for the I.R.S. |
| 45% | EMPTY | 5 | Ready for the recycling bin |
| 45% | NATKINGCOLE | 11 | R&B singer who's the father of singer Natalie: 3 wds. |
| 45% | REGINA | 6 | Latin term for Queen; the R on royal's signature |
| 45% | BLUEBIN | 7 | Colloquial term for the recycling container |
| 45% | ROMEO | 5 | Code word for the letter R |
| 45% | GOTOSLEEP | 9 | Retire for the night: 3 wds. |