Erika's crossword

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Across
  1. 1. animals home
  2. 4. greenery
  3. 6. clean the environment
  4. 8. plants
  5. 10. the only planet that we can live on
Down
  1. 2. cleans the air
  2. 3. nature
  3. 5. opposite of inside
  4. 7. not humans
  5. 9. grows