Across
- 4. The usual weather in a place
- 7. At risk of disappearing completely
- 10. Existing in nature, not made by humans
- 11. A large area with many trees
- 13. A group of similar living organisms
- 14. The power used to do work or heat
- 15. Animals living in nature, not in captivity
Down
- 1. When the environment becomes dirty or harmful
- 2. A high area of land
- 3. A large natural stream of water
- 5. The natural home of an animal or plant
- 6. A large body of salt water
- 8. A community of plants, animals, and environment
- 9. To protect something from harm
- 12. To process waste to use it again