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Scientists Expose World-Killer: Where Ozone-Destroying Chemicals Are Coming From…Hint: not cows

Banned in 1987 under the globally signed Montreal Protocol, there was only one explanation: somewhere out there, in an unknown location, someone must have gone rogue, setting back progress on the ozone hole by a decade or more.

After much speculation, the whereabouts and magnitude of these harmful emissions has been confirmed in scientific research. As earlier reporting in The New York Times had already suggestedthey seem to be coming from the northeast coast of mainland China.

Since the Montreal Protocol was declared a success in 2013, this highly industrial region has continued to emit, whether accidentally or not, CFC-11: the second most abundant chlorofluorocarbon in the atmosphere. Between the periods of 2008-2012 and 2014-2017, in fact, CFC-11 emissions increased here by roughly 110 percent.

“This increase accounts for a substantial fraction (at least 40 to 60 per cent) of the global rise in CFC-11 emissions,” an international team of researchers writes in a new report.

“We find no evidence for a significant increase in CFC-11 emissions from any other eastern Asian countries or other regions of the world where there are available data for the detection of regional emissions.”

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