1 January 1989 December 31, 2011 Author: Staff The Montreal Protocol on Substances That Deplete the Ozone Layer comes into force. Famous Words of Inspiration..."Misfortunes, untoward events, lay open, disclose the skill of a general, while success conceals his weakness, his weak points." Horace — Click here for more from Horace Related posts: 2 August 1989 15 October 1989 17 November 1989 Categories: History Tags: 1 January, 1989