| E.P.A. subj. | 12 |
| Coll. subject | 13 |
| A sci. | 6 |
| "Earth in the Balance" subj. | 38 |
| "An Inconvenient Truth" subj. | 39 |
| Type of bioscience: Abbr. | 25 |
| Tree-hugger's subj. | 23 |
| Tree-hugger's concern (abbr.) | 33 |
| Tree hugger's subj. | 23 |
| Subj. in the news | 17 |
| Subj. for nature lovers | 23 |
| Subj. for a forest ranger | 25 |
| Subj. concerned with habitats | 29 |
| Subj. concerned with bioregions | 31 |
| Study of organisms and their habitats (abbr.) | 45 |
| Study of environment: Abbr. | 27 |
| Sierra Club subj. | 17 |
| Science subject: Abbr. | 22 |
| Sci. specialty | 14 |
| Sci. of the environment | 23 |
| Sci. in the news | 16 |
| Sci. founded by Danish botanist Eugen Warming | 45 |
| Sci. for conservationists | 25 |
| Sci. concerned with the food chain | 34 |
| Sci. concerned with biodiversity | 32 |
| School subj. for environmentalists | 34 |
| Renewable energy subj. | 22 |
| Reforestation subj. | 19 |
| Rachel Carson's sci. | 24 |
| Park ranger's study: Abbr. | 30 |
| Park director's concern: Abbr. | 34 |
| Park concern: Abbr. | 19 |
| One of the life sciences: Abbr. | 31 |
| Nature science: Abbr. | 21 |
| Naturalist's subj. | 22 |
| Life sci. course | 16 |
| Kyoto Protocol concern: Abbr. | 29 |
| It's impacted by global warming: Abbr. | 42 |
| It's also called bionomics: Abbr. | 37 |
| Green's concern: Abbr. | 26 |
| Green study subj. | 17 |
| Green science: Abbr. | 20 |
| Green party focus: Abbr. | 24 |
| Green party focus (abbr.) | 25 |
| Green Party cause: Abbr. | 24 |
| Green field: Abbr. | 18 |
| Green area: Abbr. | 17 |
| Global warming subj. | 20 |
| Forester's concern: Abbr. | 29 |
| Food-chain discipline: Abbr. | 28 |
| EPA's field | 15 |
| EPA's concern, briefly | 26 |
| EPA subject | 11 |
| EPA science | 11 |
| EPA bailiwick | 13 |
| Environmentalists' subj. | 28 |
| Environmentalist's maj. | 27 |
| Environmentalism: Abbr. | 23 |
| Environmental biol. | 19 |
| Environment: Abbr. | 18 |
| Environment sci. | 16 |
| Earth-friendly coll. course | 27 |
| Earth science, for short | 24 |
| Earth science (Abbr.) | 21 |
| Earth Day subject: Abbr. | 24 |
| Division of biol. | 17 |
| Conservationist's field: Abbr. | 34 |
| Conservation subj. | 18 |
| Concern of Rachel Carson: Abbr. | 31 |
| Climate change subj. | 20 |
| Campaign issue: Abbr. | 21 |
| Branch of biology: Abbr. | 24 |
| Biosphere subj. | 15 |
| Biology branch: Abbr. | 21 |
| Bio. branch | 11 |
| Area of E.P.A. purview: Abbr. | 29 |
| 'Green' sci. | 20 |
| Energy Star mark on a product, e.g. | 35 |
| "Dolphin-safe," for one | 33 |
| French school | 13 |
| Nice school | 11 |
| Pierre's school | 19 |
| Parisian school | 15 |
| Élève's place | 24 |
| ___ des Beaux-Arts | 18 |
| Élève's milieu | 25 |
| School: Fr. | 11 |
| Paris school | 12 |
| The Sorbonne, for one | 21 |
| Strasbourg school | 17 |
| Professeur's place | 22 |
| French place of learning | 24 |
| Sorbonne, e.g. | 14 |
| Somme school | 12 |
| Simone's school | 19 |
| School, in Paris | 16 |
| Place for élèves | 22 |
| Nice school? | 12 |
| Molière's "L'___ des maris" | 48 |
| Élève's school | 25 |