Across
- 2. mixture of various decaying organic substances
- 6. capable of being supported
- 9. things like air, water, and soil together
- 10. trash on the ground
- 11. to keep something in its original state
- 14. made without chemicals
- 16. to make something new out of a used object
- 17. restored or replaced by a natural process
- 18. a place to dispose of garbage and other waste material
- 19. the surroundings or conditions in which a person, animal, or plant lives
Down
- 1. A substance discharged into the air
- 3. contamination of water and air with harmful substances
- 4. the natural home or environment of an animal, plant, or organism
- 5. layer of gasses surrounding a planet
- 7. to process used goods or waste as to produce something that is often better
- 8. sun energy
- 12. no longer exists
- 13. to protect something
- 14. a layer in the earths atmosphere
- 15. deals with the relations of organisms to one another