OZONE LAYER PROTECTION (MONTREAL PROTOCOL) September 16:   This special day is held on September 16th to mark the day back in 1987 when the Montreal Protocol was signed. January 01, 1989:   The Montreal Protocol on Substances That Deplete the Ozone Layer came into force on this day.  About  CROSSWORD on the subject  Fill-the-Gaps QUIZ on the subject    VIDEOS   Fill-the-Gaps QUIZ on History of this day   QUOTES of the day  (on BHAGAVAD GITA)