Banned Ozone-Harming Gas Creeps Back, Suggesting a Mystery Source

Read the full story in the New York Times.

Government scientists have detected an increase in emissions of an outlawed industrial gas that destroys ozone, potentially slowing progress in restoring the atmosphere’s protective ozone layer.

The scientists say that the increase is likely a result of new, unreported production of the gas, known as CFC-11, probably in East Asia. Global production of CFC-11, which has been used as a refrigerant and in insulating foams, has been banned since 2010 under an environmental pact, the Montreal Protocol.

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