Across
- 3. risk
- 5. die under water
- 9. a large flat area of ice floating on the surface of the sea
- 11. ecosystem issue
- 13. how hot or cold s.t., usually the weather, is
- 16. rare
- 17. enlarge
- 18. pollution
- 20. how high or low the sea is
Down
- 1. died out
- 2. desert
- 4. the Arctic
- 6. opposite of decrease
- 7. reduce
- 8. effect
- 10. crack
- 12. rise
- 14. can’t see anymore, gone forever
- 15. change from ice to water
- 19. the remains