Ozone Depletion

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  • Ozone Depletion
    • Cl Radicals
      • Initiation
        • CFCl3 --> Cl(rad) + CFCl2(rad)
      • Propagation 1
        • Cl(rad) + O3 --> ClO(rad) + O2
      • Propagation 2
        • ClO(rad) + O --> Cl(rad) + O2
    • NO Radicals
      • Propagation 1
        • NO(rad) + O3 --> NO2(rad) + O2
      • Propagation 2
        • NO2(rad) + O --> NO(rad) + O2
    • Nitrogen Oxide is made when lightening strikes, or from aeroplane engines
    • CFCs were first used in refrigerators, or aerosol propellants as they had non-flammable desirable properties
      • They may take decades to reach the ozone layer, however once there they are split by UV radiation to form chlorine radicals which deplete the ozone layer
    • Call for regulation of CFCs was put into action by the Montreal Protocol which phases out CFC use

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