Ozone Depletion
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Ozone Depletion






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    Ozone Depletion Ozone Depletion Presentation Transcript

    • Ozone Depletion By Clarisse, Suleyman and Suzy
    • Table of Content
      • Defining Ozone Depletion
      • The Worst Effected Region
      • Main Causes
      • Why and How Ozone Depletion Happens
      • Consequences
      • Few Diagrams Explaining the Consequences
      • Suggested Solutions
    • Defining Ozone Depletion
      • Ozone Layer:
      • - protects the earth from ultraviolet rays
      • part of the earth’s atmosphere
      • contains high concentration of Ozone (O3)
      • concentration of O3 is small
      • important to life
      Ozone Depletion: - large hole in the protection of the earth (ozone) - observed loss of ozone (over 50 years) - mainly above the northern and southern poles - more ultraviolet rays hitting/affecting earth - Man made substances
    • The Worst Hit Due to Ozone Depletion
      • Where?
      • Antarctica (worst hit).
      • What?
      • Ozone layers have dropped to 33% since 1975
      • Over 50% is destroyed
      • Great shock
      • Why/How?
      • Polar regions have larger variation in sunlight
      • Extremely low temperatures and Antarctic conditions
      • Cloud formation cause crystals
      • Crystals cause many reactions to occur
    • Main Causes
      • What?
      • Cosmic Rays
      • Sulphur put into the atmosphere
      • Stratospheric clouds together with Chlorine, Bromine and nitrogen oxides
      • Chlorofluorocarbons (CFC’s)
      Stratospheric clouds
    • Why?How?
      • Cosmic Rays:
      • Different types of rays
      • Rays react differently towards ozone
      • Not guaranteed as the cause
      • Sulphur:
      • Scientist still testing
      • Might not be the cause
      • Stratospheric Clouds:
      • Part of ozone layer
      • Support chemical reactions such as chlorine
      • Chlorine is a catalyst for ozone depletion
      • Stops the nitric acid from forming the cloud
      • Chlorofluorocarbons:
      • Compounds of chlorine, carbon and fluorine
      • Used as propellants
      • Unreactive
      • Remain in atmosphere for long time
    • Consequences Leading to Health Concerns
      • 10% loss in ozone, becomes 26% increase in skin cancer e.g. malignant melanoma- (skin cancer) e.g.2 Basal and Squamous Cell Carcinomas (skin cancer)
      • Reduces resistance to disease
      • Reduction in food products- damage plant tissues + destroys crops
      • Increase in eye disorders + cataracts
      • Decrease in plankton
    • A diagram of how ozone depletion affects the rest of our world.
    • Important Solutions to Minimize Ozone Depletion
      • Suggestions:
      • Use less chemicals, phase out pollution
      • Work together to reduce rate of depletion
      • Add ozone to stratosphere
      • Destroy CFC’s