Across
- 4. Word used to describe when scientists disagree (begins with d).
- 7. Home to the polar bears.
- 11. Without such gases, Earth would be a cold rock in space.
- 13. Most countries signed this Treaty to reduce emissions.
- 15. The level of carbon dioxide is doing this.
- 16. An alternative energy source.
- 17. You can be part of it.
- 19. Another alternative energy source.
Down
- 1. Buy more foods that are...(synonym for nearby)
- 2. It takes this to make packaging.
- 3. One of the three Rs.
- 5. Synonym for severe, as in weather.
- 6. Keeling measured this dioxide.
- 8. Very dry conditions, without rain.
- 9. The other pole.
- 10. Main cause of more greenhouse gases.
- 12. Last name of the biologist.
- 14. Favourite food for polar bears.
- 18. Turn these off when you leave a room.