Across
- 4. poisonous materials that pollute the earth
- 6. A large fire in woods or forests.
- 7. Cutting down a large area of trees
- 8. A rotating storm with very high winds.
- 9. Something harmful released into the environment.
Down
- 1. An increase in the earth's temperature
- 2. A large amount of water on dry land.
- 3. gases like carbondioxide that traps heat above the earth's surface
- 5. A shortage of water caused by very low rain