VOCABULARY - ENVIRONMENT

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Across
  1. 2. The process of using recycled materials
  2. 4. An animal or plant threatened with extinction
  3. 6. A source of energy that does not harm the environment
  4. 9. The act of throwing away unwanted items
  5. 10. The layer of gas surrounding the Earth
Down
  1. 1. A natural resource that can be replenished
  2. 3. A gas that contributes to global warming
  3. 5. The gradual destruction of land due to lack of rain
  4. 7. A group of people working to protect the environment
  5. 8. A large area of forest destroyed by fire
  6. 11. The study of living things and their environment