Air Pollution

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Across
  1. 5. pH of acid rain
  2. 7. Long term effect of air pollution
  3. 8. Where most air pollution comes from
  4. 9. Air pollution that hangs over cities
  5. 11. Gas most responsible for the greenhouse effect (2 words)
  6. 13. Solar radiation warms the Earth's surface (2 words)
  7. 14. Short term effect of air pollution
  8. 15. Occurs when acid suddenly enters a lake or stream and changes the pH (2 words)
  9. 20. Pollutants put directly into the air by human activity.
Down
  1. 1. Precipitation that contains a high concentration of acids (2 words)
  2. 2. Gradual increase in global temp. due to greenhouse gases (2 words)
  3. 3. Place where the ozone holes are occurring.
  4. 4. Can damage genetic material (2 words)
  5. 6. International treaty with the goal of reducing CO2 emissions (2 words)
  6. 10. Absorb some solar energy and radiate it back to Earth (2words)
  7. 12. A molecule of three oxygen atoms that absorbs most UV light
  8. 16. May be more polluted than indoors
  9. 17. Pollutants that form when coming into contact with another primary pollutant
  10. 18. Human made chemicals that are damaging the ozone layer.
  11. 19. Type of pollution that wastes energy