Across
- 4. To believe that something is probably true
- 5. To say a word or phrase repeatedly
- 6. A small pool of water or mud
- 10. To grab something
- 12. The act of objecting to something publicly
- 13. A tool used to pick up and hold things
- 14. The Earth, used especially when we talk about the environment
- 17. To release something that is twisted up in something else
- 18. An essential part of something
Down
- 1. Any of the gases that cause the greenhouse effect, such as carbon dioxide
- 2. A car or truck
- 3. Being near the coast
- 7. The area or neighborhood in the center of a large town or city
- 8. To increase in temperature
- 9. To make something remain in a steady state
- 11. To do or perform
- 15. In a depressing way; sadly
- 16. A large area covered with coral under the surface of the ocean