Air pollution crossword

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Across
  1. 3. Water in the form of gas
  2. 4. Rain that is more acidic than normal.
  3. 7. Makes up 78% of the atmosphere.
  4. 8. Outside layer of our atmosphere.
  5. 10. ______ Dioxide: Greenhouse gas that is mass produced by cars.
  6. 13. Large factor to air pollution: drivable.
  7. 15. Brownish haze found in large cities.
  8. 16. Keeps too many UV rays from coming through the atmosphere.
  9. 17. What happens to our Earth because of humans.
  10. 18. Layer of the atmosphere that we live in.
  11. 20. Solid particles or gases of pollution.
  12. 21. Colorless, odorless gas that is radioactive.
Down
  1. 1. Natural pollutant that erupts and emits thick smoke.
  2. 2. What type of radiation does the Ozone layer block out?
  3. 5. How many layers of the atmosphere are there?
  4. 6. Warmest layer of the atmosphere.
  5. 9. What layer of the atmosphere has the ozone layer?
  6. 11. Makes up 21% of the atmosphere.
  7. 12. Stops meteors from hitting the Earth.
  8. 14. What percent of the atmosphere is not Nitrogen or Oxygen?
  9. 19. Made of 3 oxygen atoms.