Researchers have been puzzled by rising levels of trichlorofluoromethane (CFC-11), but a new study suggests the Chinese provinces of Shandong and Hebei are the source
Source:
https://www.newscientist.com/article/2203817-china-confirmed-as-source-of-illegal-ozone-destroying-chemicals/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home