Across
- 3. maintain (something) in its original or existing state.
- 6. a place to dispose of refuse and other waste material by burying it and covering it over with soil, especially as a method of filling in or extending usable land.
- 8. the envelope of gases surrounding the earth or another planet.
- 9. a biological community of interacting organisms and their physical environment.
- 10. the sun's rays as a source of energy from which power for domestic or industrial use may be generated.
Down
- 1. decayed organic material used as a plant fertilizer.
- 2. the surroundings or conditions in which a person, animal, or plant lives or operates.
- 4. convert (waste) into reusable material.
- 5. the natural home or environment of an animal, plant, or other organism.
- 7. reuse (discarded objects or material) in such a way as to create a product of higher quality or value than the original.