What has led to the hole in the ozone now being the smallest it has been since it was discovered in 1982? How much of this is due to changes in hairspray manufacture and how much is just environmental chance? - Dee Francis Padamadan, Technical Director at Pellegrini UK Ltd. (2017-present) Answered Oct 23

https://www.quora.com/What-has-led-to-the-hole-in-the-ozone-now-being-the-smallest-it-has-been-since-it-was-discovered-in-1982-How-much-of-this-is-due-to-changes-in-hairspray-manufacture-and-how-much-is-just-environmental-chance/answer/Dee-Francis-Padamadan