Levels of ozone-depleting gas spiked when air from industrialised areas of China arrived, say researchers
Industries in north-eastern China have released large quantities of an ozone-depleting gas into the atmosphere in violation of an international treaty, scientists have said.
Since 2013, annual emissions of the banned chemical Chlorofluorocarbon-11 (CFC-11) from that region have increased by about 7,000 tonnes, according to a report in peer-reviewed journal Nature.
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