Environment

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Across
  1. 5. Hottest region of the atmosphere
  2. 7. Contains the ozone layer
  3. 8. The process of converting waste materials into new materials and objects
Down
  1. 1. The layer of gases surrounding Earth
  2. 2. Highest content of gas in the atmosphere
  3. 3. water on the earth’s surface
  4. 4. Non-living chemical and physical parts of the environment
  5. 6. Coldest zone of the atmosphere