| Rain forest, e.g. | 17 |
| Environmental group functioning as a unit | 41 |
| Certain scientific niche | 24 |
| Biological community | 20 |
| Biodiversity setting | 20 |
| Coral reefs, e.g. | 17 |
| They're full of life | 24 |
| They may be carefully balanced | 30 |
| Living quarters? | 16 |
| Treachery brought on to a polluter | 34 |
| Environmental vandalism | 23 |
| Environmental extremists' acts | 34 |
| Earth Liberation Front doings | 29 |
| Earth Liberation Front activity | 31 |
| Chemical plant graffiti, perhaps | 32 |
| Transition zone between two plant communities | 45 |
| Biome border | 12 |
| Environmental transition area | 29 |
| Transitional zone between plant communities | 43 |
| Transitional land zone between forests and grasslands, e.g. | 59 |
| Transitional land zone | 22 |
| Transition zone between plant communities | 41 |
| Transition area from deciduous to evergreen, e.g. | 49 |
| Plant transition zone | 21 |
| Ecological transition area | 26 |
| Area between forest and prairie, e.g. | 37 |
| Transitional zones between different plant communities | 54 |
| 1975 seminal green movement novel by Ernest Callenbach | 54 |
| Vacation for environmentalists | 30 |
| Trip for nature lovers | 22 |
| Travel to endangered areas | 26 |
| Responsible holiday choice | 26 |
| Hippie's trip, perhaps | 26 |
| Environmentally sensitive vacation choice | 41 |
| Environmentalist's vacation, maybe | 38 |
| Vacationing naturist, perhaps | 29 |
| Traveler who tries not to make much of an impact? | 49 |
| Traveler to an environmentally protected area | 45 |
| Trips to environmentally protected areas | 40 |
| Trips through rain forests, maybe | 33 |
| Trips for nature lovers | 23 |
| Shares: Fr. | 11 |
| Environmental subspecies | 24 |
| Environmental subgroup | 22 |
| Environmental subdivision | 25 |
| It might involve blowing up oil wells | 37 |
| Green activist | 14 |
| Crushed, as leather | 19 |
| Deli drink | 10 |
| Cry out: Fr. | 12 |
| To write, to Pierre | 19 |
| Written: Fr. | 12 |
| Pamphlet, in Paris | 18 |
| Prefixes for outside | 20 |
| "Popeye" cartoonist | 29 |
| Swee' Pea's creator | 27 |
| Cartoonist who created Popeye | 29 |
| Rapturous | 9 |
| Thrilled beyond words | 21 |
| Literally, out of one's body | 32 |
| In orbit | 8 |
| Happy to the max | 16 |
| Full of joy | 11 |
| Beyond happy | 12 |
| Outward: Anat. | 14 |
| Outward, anatomically | 21 |
| Outward, to an anatomist | 24 |
| Outer | 5 |
| Outer, to an M.D. | 17 |
| Outer, anatomically | 19 |
| Outer in anatomy | 17 |
| Greek Orthodox Church litany | 28 |
| Growth hormone, abbr. | 21 |
| Outermost cell layer | 20 |
| Outer germ layer that develops into skin | 40 |
| Outer membrane of a jellyfish | 29 |
| Outer germ layer | 16 |
| Embryological layers | 20 |
| Body type | 9 |
| One with a slight build | 23 |
| Surgery suffix | 14 |
| ER removal: suffix | 21 |
| Franklin's father was born here | 35 |
| English village | 15 |
| What supposedly emanates from a medium | 38 |
| Medium's output | 19 |
| Foster father of King Arthur | 28 |
| Father of Sir Kay | 17 |
| Copy from an original | 21 |
| Copy of an original | 19 |
| Foam, to François | 20 |
| Civilizations | 13 |
| Promoting unity | 15 |
| General; universal | 18 |
| Mews on the Meuse | 17 |
| Burlesque performers | 20 |
| Broadbent or Belfour | 20 |
| Shack or Shore | 14 |
| Jovanovski, for one | 19 |
| Edward, familiarly | 18 |