Life on land crossword

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Across
  1. 6. Convert waste into reusable material
  2. 8. Variety of plant and animal life
  3. 9. Permanent disappearance of a species
  4. 10. Means of earning a living
  5. 11. Farming and food production activity
  6. 12. Communities of living things interacting with their environment
Down
  1. 1. Clearing or loss of forests
  2. 2. Kept safe from harm or damage
  3. 3. State of extreme lack of resources
  4. 4. Using resources without harming the future
  5. 5. Animals living in nature
  6. 7. Release of gases into the air