Across
- 3. - to not waste electricity
- 5. - a flat part of land usually below sea level
- 8. - to cover a place with water
- 9. - to sink and die
- 11. - the plants we grow to eat don't grow properly
- 12. - in place of
- 13. - An increase in the world's temperature due to pollution
- 14. - a repeating change in weather conditions
- 16. - to no longer have something(3 forms)
- 18. - to move upwards, to go up(3 forms)
- 19. - to make less
Down
- 1. - the level of hotness and coldness
- 2. - to become liquid because of heating
- 4. - the action of making the air dirty
- 6. - height, position
- 7. - the large areas of ice at the polar regions
- 10. - to no longer exist or be seen
- 15. - a long period without rain
- 17. to look for