Across
- 2. Trash left lying in an open or public place.
- 4. A mixture of gases and the whole mass of air surrounding the Earth.
- 7. Able to be maintained at a certain rate or level.
- 9. Contaminate with harmful or poisonous substances.
- 10. Surroundings in which life exists on Earth.
Down
- 1. Decaying organic material used as plant fertilizer.
- 3. A community of living organisms.
- 5. Releasing something from a source, such as gas, heat, light, or particles.
- 6. Power from the suns radiation.
- 8. A place to dispose of refuse and other waste material.