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| It broken down by sunlight, whereupon the chlorine reacts with and destroys ozone molecules—up to 100,000 per CFC molecule. | |
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| The use of CFCs in aerosols has been banned in the United States and elsewhere. | |
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| Other chemicals, such as bromine halocarbons, as well as nitrous oxides from fertilizers, may also attack the ozone layer. | |
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