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

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Refrigerators at a dump in New Orleans in 2006 after Hurricane Katrina. Chlorofluorocarbons were once commonly used as a refrigerant in appliances like these, but have been banned since 2010.Credit Vincent Laforet/The New York Times

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.