幾年還前見有報道，有人繼續偷偷生產使用CFC-11

找了一下，網上還有：

https://www.nature.com/articles/s41586-019-1193-4

https://www.theguardian.com/world/2019/may/23/china-factories-releasing-thousands-of-tonnes-of-illegal-cfc-gases-study-finds