The scientists say what has been beneficial for the ozone layer could be disastrous for the world's climate, because HCFCs turn into "super greenhouse gases", some of them nearly 5,000 times stronger than carbon dioxide.
       
    As long as they stay inside our air-conditioners and refrigerators, HCFCs are harmless coolants, colorless and odorless. But when they leak into air, they become what scientists call fluorinated greenhouse, or F-gases.

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