http://www.newsweek.com/cfc-11-ozone-depletion-ozone-layer-atmosphere-cfcs-china-993598

In May, scientists reported an unexpected rise in ozone-depleting emissions in Nature. Someone, somewhere, they suspected, is releasing banned CFC-11 into the atmosphere.

Now, journalists at the New York Times think they've narrowed down the suspects. The outlawed gas, the newspaper reports, is likely coming from several factories in China.