OzoneDepletion

OzoneDepletion - Ozone Depletion OZONE DEPLETION IN THE...

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Ozone Depletion
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OZONE DEPLETION IN THE STRATOSPHERE o Less ozone in the stratosphere allows for more harmful UV radiation to reach the earth’s surface. The ozone layer keeps about 95% of the sun’s harmful UV radiation from reaching the earth’s surface. In the 1960s scientists noticed ozone concentrations were dropping.
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Good Ozone! Bad Ozone!
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Stratospheric ozone depletion o In 1974, Sherwood Rowland and Mario Molina pegged the blame on chlorofluorocarbons (CFCs). o They won the Nobel Prize for this scientific detective work. o CFCs = human-made molecules in which hydrogens of hydrocarbons are replaced by chlorine and fluorine atoms o Mass-produced by industry, in refrigerants and consumer products like aerosol sprays
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Chlorofluorocarbons (CFCs) o Organic molecules in which both chlorine and fluorine atoms replace some of the hydrogen atoms o Sources: refrigerators and air conditioners production of plastic foam cleaner for electronic parts pressurizing agent in aerosol cans
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This note was uploaded on 12/29/2010 for the course ENGR 514 taught by Professor Snitter during the Fall '10 term at Oregon Tech.

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OzoneDepletion - Ozone Depletion OZONE DEPLETION IN THE...

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