Environment

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Across
  1. 1. A greenhouse gas absorbed by trees.
  2. 4. A type of pollution caused by excessive noise.
  3. 5. The careful use and protection of natural resources.
  4. 6. Energy generated by moving air.
  5. 8. Material that can be processed and used again.
  6. 10. The practice of planting trees to restore forests.
  7. 11. Material that breaks down naturally in the environment.
  8. 13. The introduction of harmful substances into the environment.
  9. 15. The variety of life on Earth.
Down
  1. 2. The annual event celebrated on June 5 to raise environmental awareness.
  2. 3. The process of converting waste into reusable material.
  3. 7. The act of protecting nature from damage or destruction.
  4. 9. A source of energy from the sun.
  5. 12. A large area covered mainly by trees.
  6. 14. The layer of gases surrounding Earth.