Chlorine from chlorofluorocarbons, or CFC's, is responsible for destroying part of the ozone layer over Antarctica.

含氯氟烃(CFC's)中的氯是对南极上空部分臭氧层造成破坏的化学物质.

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Each year, the world uses approximately 750,000 metric tons of CFC's.

每年, 全世界大约使用乃万公吨的氯氟化碳.

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Once in the upper atmosphere, CFC's react with ozone to destroy it.

氯氟化碳一旦进人上层大气, 就会与臭氧发生反应,从而破坏臭氧层.

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In addition, CFC's are used in fire extinguishers as well.

此外, 氯氟化碳也用于灭火器中.

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