Across
- 5. The disposal of refuse and other waste material by burying it and covering it over with soil
- 6. The envelope of gases surrounding the earth or another planet
- 8. The process of converting waste materials or useless products into new materials or products of better quality or a higher...
- 9. Capable of being renewed
- 11. The production and discharge of something
- 12. Able to be maintained at a certain rate or level
- 14. Protect (something, esp. an environmentally or culturally important place or thing) from harm or destruction
- 16. Maintain (something) in its original or existing state
Down
- 1. Decayed organic material used as a plant fertilizer
- 2. Trash, such as paper, cans, and bottles, that is left lying in an open or public place
- 3. Contaminate (water, air, or a place) with harmful or poisonous substances
- 4. The natural home or environment of an animal, plant, or other organism
- 7. The surroundings or conditions in which a person, animal, or plant lives or operates
- 10. A colorless unstable toxic gas with a pungent odor and powerful oxidizing properties, formed from oxygen by electrical discharges or..
- 12. energy derived from the sun's rays
- 13. A biological community of interacting organisms and their physical environment
- 15. Of, relating to, or derived from living matterecology
- 17. Convert (waste) into reusable material
- 18. No longer in existence