In a followup to a story previously on Soylent News: https://soylentnews.org/article.pl?sid=18/05/17/022243 [soylentnews.org]
It seems that at least part of an unexpected increase in CFC-11 (an ozone depleting chemical) is due to small factories in China manufacturing the chemical for use in making Styrofoam insulation for refrigerators. The normal alternative, HCFC-141b is expensive and in short supply. The illegal factories are set up, run for a time until discovered and then move to a new location. In addition to being cheaper, CFC-11 gives a better foaming action than the ozone safe alternative.
https://www.nytimes.com/2018/06/24/world/asia/china-ozone-cfc.html [nytimes.com]