Across
- 4. The ___ is the gases surrounding Earth or another planet.
- 6. A product grown or raised without the use of chemical or other artificial agents
- 8. A place to dispose of refuse and other waste material by buying it and covering it over with soil, especially as a method of filling in or extending usable land.
- 9. Decayed organic material used as a plant fertilizer.
- 10. A source of energy that is not depleted by use, such as water, wind, or solar power.
Down
- 1. The natural home or environment of an animal, plant, or other organism.
- 2. The production and discharge of something, especially gas or radiation.
- 3. Convert waste into reusable material.
- 5. The ___ is a biological community of interacting organisms and their physical environment.
- 7. Reuse materials to create a product of higher quality or value than the original.