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What problem does chlorofluorocarbon (CFC) create?
a. it causes lead poisoning
b. it causes great damage to the ozone layer
c. it leaks into food as it cools the air and refrigerators
d. it is responsible for most of the pollution created by automobiles

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What problem does chlorofluorocarbon (CFC) create?
a. it causes lead poisoning
b. it caus...
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