The environemnt

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Across
  1. 4. to make decayed leaves, plants, or other organic waste into a mixture that can improve the soil's quality to help plants grow more quickly
  2. 7. related to a type of farming in which animals and birds can move around and eat freely, instead of being kept in a limited area
  3. 9. containing or relating to a dangerous form of energy produced by nuclear reactions
  4. 10. (of an object) able to be broken down by living organisms such as bacteria, which is then safe for the environment
  5. 11. animals,birds, and plants living in their natural habitat
  6. 12. relating to the environment
  7. 13. to remove unwanted or harmful substances from another substance
Down
  1. 1. any substance that is harmful to the environment
  2. 2. using more of something than can be replaced naturally
  3. 3. to make a place, substance, etc. dirty or harmful by adding dangerous material
  4. 5. amountof carbon dioxide produced by a person or company’s activity
  5. 6. (of natural substances such as oil) unprocessed and in raw form
  6. 8. place where people, plants, and animals live