| Environmentally friendly prefix |
| Air-conditioning refrigerant causing environmental concerns |
| Acted in an environmentally conscious way |
| Of the surrounding environment |
| Acronym used to protest environmental hazards nearby |
| The scholarly world |
| Environmental activist, and the letters changed in the theme answers |
| Be a good environmentalist |
| Bureaucratic environmental regulations |
| Environmental transition area |
| Animal's environment |
| Environmentally unfriendly cars? |
| Fogbound tropical environments |
| Dobbs who blasted "The Lorax" for its environmentalist message |
| Rapid-growth environment |
| Environmentalist's maj. |
| Environmentalist's celebration |
| Astronaut's work environment, for short |
| ___ Sea (environmental tragedy of Kazakhstan) |
| Environmentalist's sci. |
| Environmental problem addressed in the Clean Air Act |
| The Simpsons" girl who's an environmentalist |
| Groups that have adapted to their environments |
| Environmentalist's prefix |
| Environmentalist's goal |
| Environment-related, like the lyrics to "Mercy Mercy Me |
| Environmentalist's urge |
| Crusading environmentalist |
| Learned environment |
| Environmental subdivision |