Across
- 2. warming an increase in the average temperature of the Earth.
- 3. an element with the symbol C.
- 6. day to day changes in daily temperatures.
- 8. the process of cutting down a large number of trees.
- 10. another name for the sun.
- 11. fuel from decayed remains of animals and plants.
Down
- 1. presence into the environment of a substance that is harmful.
- 4. O3.
- 5. a glass house that traps heat.
- 7. used in refrigerator.
- 9. a liquid that can dissolve another substance.