Unit 5

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Across
  1. 7. harmful materials in the environment
  2. 8. forest with a lot of tall trees
  3. 9. keep something the same or prevent from damage
  4. 11. to hurt or damage
  5. 12. the natural world
Down
  1. 1. surroundings or conditions
  2. 2. land not in towns or cities
  3. 3. when an animal/plant stops to exist
  4. 4. planet we live in
  5. 5. increase in the world temperature
  6. 6. person travelling or visiting a place
  7. 8. changing waste into reusable material
  8. 10. a type of heavy fog