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Ozone Layer

Ozone Layer. CFCs- Chlorofluorocarbons. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants. .

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Ozone Layer

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  1. Ozone Layer

  2. CFCs-Chlorofluorocarbons • They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.

  3. The non-reactivity of CFC's, so desirable to industry, allows them to drift for years in the environment until they eventually reach the stratosphere. High in the stratosphere intense UV solar radiation severs chlorines off of the CFC's, and it is these unattached chlorines that are able to catalytically convert Ozone molecules into Oxygen molecules: • Cl + O3 ---> ClO + O2 ClO + O3 ---> 2 O2 + Cl.

  4. Montreal Protocol • 1987 international meeting designed to phases out CFCs by 2000.

  5. Effects • Humans: Cancer, Cataracts, immune weakening • Marine Ecosystems • Plants

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