Across
- 7. It prevents harmful UV light from the sun from reaching the Earth.
- 8. The process by which land changes into a desert.
- 10. Animals or plants which may soon not exist.
Down
- 1. The cutting down of trees in a large area.
- 2. Rain that contains large amounts of harmful chemicals.
- 3. Energy that comes from sources that naturally renew.
- 4. A gradual increase in world temperatures.
- 5. Damage caused to water, air or soil by harmful waste.
- 6. The process of collecting rubbish to produce new materials.
- 9. Unwanted material of any type; trash.