Crossword science

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Across
  1. 2. environmental pollutant
  2. 5. includes carbon,chlorine,fluorine
  3. 8. system for lung and air
  4. 10. connects bone and muscle
  5. 12. eater
  6. 14. protects brain
  7. 15. makes plant’s color
Down
  1. 1. hearts and blood and starts with a c
  2. 3. used in yogurt and cheese
  3. 4. people grow this at gym
  4. 6. transparent container in science
  5. 7. sends message
  6. 9. could be renewed again
  7. 11. decomposing and microorganisms makes colonies
  8. 13. gas from burning