Environment crossword

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Across
  1. 2. What do you call the processing of used materials and their reuse?
  2. 5. What is the most used renewable energy source in the world?
  3. 6. which gas is responsible for global
  4. 8. what do you call a substance that pollutes the air, water or soil?
  5. 10. what do you call the area that is inhabited by a particular species?
  6. 11. what do you call renewable safe sources of energy?
Down
  1. 1. which of these energy sources is renewable?
  2. 3. the process by which the Earth’s temperature is increasing is called the ...
  3. 4. a natural fuel such as coal or gas
  4. 7. What do you call the rain thatcontains many chemicals and is harmful?
  5. 9. Which of the following is biodegradable?