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CFC gas is a gas that is bad for the environment.
CFC gas was once widely used as a refrigerant in refrigerators and air conditioners.
CFC gas was identified as the cause of ozone layer depletion, and international regulations were introduced.
The mechanism by which CFC gas destroys the ozone layer has been scientifically elucidated.
Although alternative CFC gases have less impact on the ozone layer, they have the problem of a high global warming potential.
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