Montreal Protocol (1 Viewer)

[Stimuli]

Can anyone help me with facts about the Protocol? I read somewhere it reduced the hole in the ozone layer by 70% but then elsewhere it was only a 2.5millon km square reduction from 27.5Mkm.

Any other statistics and information is appreciated. I have read so much about Chlorofluorocarbons but nothing really on actually facts about the Ozone reduction

Thanks!