Environment

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Across
  1. 2. to make something less pure or make it poisonous
  2. 4. an increase in the amount of carbon dioxide and other gases in the atmosphere (2 words)
  3. 8. the activity of cutting down trees in order to use their wood
  4. 9. removal of everything that is not wanted from an area (2 words)
Down
  1. 1. a situation in which something no longer exists
  2. 3. using methods that do not harm the environment
  3. 5. having no protection
  4. 6. to make sth become less
  5. 7. animals and plants that grow independently of people, usually in natural conditions
  6. 10. to get rid of something unwanted, especially by leaving it in a place where it is not allowed