Across
- 2. Rays
- 6. water filled with poisonous substances
- 8. To protect
- 9. A colorless unstable toxic gas
- 10. Once lived
Down
- 1. The surrounding of which a person or animal lives
- 3. Mixture of gases
- 4. To reuse
- 5. Trash from humans
- 7. A place where animals live