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| Molina and Rowland, |
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| Nature 1974 |
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| In the stratosphere… |
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| CFCs
: CCl2F2 CClF2• +
Cl• |
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| Cl• +
O3 ClO•
+ O2 |
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| ClO• + O Cl• +
O2 |
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| Net: O +
O3
2O2 |
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| The Cl acts basically as a
catalyst: |
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| ~10,000 O3 will break down to O2
for every Cl• |
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