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That was quick. Just a week after an alarming report that a banned ozone-depleting chemical is being pumped into the air from somewhere in Asia, researchers claim to have found where some of it is coming from.
The substance in question is a chlorofluorocarbon (CFC) called CFC-11, which was once used in refrigerators. Production of CFC-11 was banned in 2006 under the Montreal Protocol, which regulates chemicals that damage the ozone layer.
However, on 16 May Stephen Montzka at the National Oceanic and Atmospheric Administration in Boulder, Colorado and his colleagues revealed that the rate…
