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8th grade ch. 5 sec. 5 cancer & the environment
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8th grade ch. 5 sec. 5 cancer & the environment

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  • 1. Ch. 5 Sec. 5 Cancer & the Environment
  • 2. chimney sweeps in London
    • usually poor boys
    • soot ground into skin
    • developed skin cancer
  • 3. Mary Poppins-Chim Chim Cher- ee song
  • 4. Dr. Percival Pott
    • recommended chimney sweeps bathe frequently to clean off soot
    • 1 of 1 st scientists to understand environment can affect people’s health
  • 5. Scientists identified the carcinogens in soot. They are the same substances that make up the tar in cigarette smoke.
  • 6. EPA
    • E nvironmental P rotection A gency
    • purpose:
      • enforce environmental laws
      • identify environmental carcinogens
      • develop strategies for protecting people
  • 7. environmental carcinogens today asbestos ultraviolet light Vinyl chloride arsenic
  • 8. asbestos
    • mineral that does not burn
    • once used in roof shingles, brake linings & insulation
    • breathing in fibers can cause lung cancer
    • manufacture & use banned in 1989
    Asbestos
  • 9. Asbestos fire-proof but fatal
  • 10. removing dangerous asbestos Asbestos removal video
  • 11. ultraviolet light
    • decrease in protective ozone layer - allows more UV light to reach Earth
    • increase in skin cancer
  • 12.  
  • 13. Ozone hole is getting larger each year!
  • 14. What is causing the depletion of the ozone layer?
    • release of chlorofluorocarbons (CFCs)
    • CFCs given off by refrigerators, air conditioners & aerosol cans.
  • 15. skin cancer can result from overexposure to the sun
  • 16. Skin Cancer (2:38)
  • 17. vinyl chloride
    • colorless gas that makes PVC
    • vapors cause liver, brain or lung cancer
  • 18. arsenic
    • Used for wood preservative & pesticides
    • Increases risk of cancer
  • 19. Let's review !
  • 20. asbestos ultraviolet light environmental carcinogens today
  • 21. chimney sweeps in London
    • usually poor boys
    • soot ground into skin
    • developed skin cancer
  • 22. ultraviolet light
    • decrease in protective ozone layer - allows more UV light to reach Earth
    • increase in skin cancer
  • 23. Dr. Percival Pott
    • recommended chimney sweeps bathe frequently to reduce risk of skin cancer
    • 1 of 1 st scientists to understand environment can affect people’s health
  • 24. EPA
    • Environmental Protection Agency
  • 25. What does the EPA do?
    • enforce environmental laws
    • identify environmental carcinogens
    • develop strategies for protecting people
  • 26. What is causing the depletion of the ozone layer?
    • release of chlorofluorocarbons (CFCs)
    • CFCs given off by refrigerators, air conditioners & aerosol cans.