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A chlorofluorocarbon is a human-made chemical that contains , , and carbon. People almost always say CFC, which is much easier, and this entry is that chemical — not some other thing those three letters might stand for. For years were used in fridges, air-conditioners, spray cans, and foam, because they were stable and did not catch fire easily. Then scientists showed they rise high in the sky and eat away at the ozone layer, the shield that blocks a lot of the sun’s harsh rays. Most countries agreed to stop making the worst . Though actually, people mix this story up with climate change. The famous CFC crime is the ozone hole. also trap heat, but the everyday warming word is more often carbon dioxide, which is a different chemical. Some replacements spare ozone and still trap heat. Older speakers may still say Freon, which began as a brand name.
氟氯碳化物（CFC；中國大陸常稱氯氟烴）
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
chlorofluorocarbonnoun
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chemistrynatural-sciencesorganic-chemistryAny of a class of organic compounds in which the hydrogen atoms of a hydrocarbon are replaced with those of chlorine and fluorine; formerly used as refrigerants and aerosol can propellants but withdrawn due to causing damage to the ozone layer.
- The proposed replacement for CFC-11, a chlorofluorocarbon used to make plastic foam and in central air-conditioning systems, is a compound called HCFC-22. This is a chlorofluorocarbon already in use in home air-conditioners, but it is more expensive than CFC-11 and its potential applications are limited by its inferior characteristics.
- The Renew is also free of polyvinyl chloride, asbestos, chlorofluorocarbons and halons.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。