Across
- 2. produced or involving production without the use of chemical fertilizers, pesticides, or other artificial agents.
- 4. relating to or determined by the sun
- 5. convert waste into reusable material
- 7. capable of being re-established
- 8. the production and discharge of something, especially gas or radiation.
- 9. able to be maintained at a certain rate or level
- 12. bring someone or something to a lower or weaker state, condition, or role
- 14. decayed organic material used as a plant fertilizer.
- 15. trash, such as paper, cans, and bottles, that is left lying in an open or public place.
- 16. contaminate (water, air, or a place) with harmful or poisonous substances.
- 18. the natural home or environment of an animal, plant, or other organism
- 19. emitting or relating to the emission of ionizing radiation or particles
Down
- 1. the envelope of gases surrounding the earth or another planet.
- 3. a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
- 6. having no living members
- 10. capable of being decomposed by bacteria or other living organisms
- 11. imbue something with new life and vitality.
- 13. a biological community of interacting organisms and their physical environment.
- 17. a place to dispose of refuse and other waste material by burying it and covering it over with soil
- 20. a colorless unstable toxic gas formed from oxygen by electrical discharges or ultraviolet light.
