Ozone Day 2017 – Pledge Ozone Day 2017 (BACK) RESULTS OF SCHOOL COMPETITION – 2017 23RD INTERNATIONAL DAY FOR THE PRESERVATION OF THE OZONE LAYER COMPETITION FOR SCHOOL STUDENTS Theme Pledge Press Release Success Story Sticker Poster Newsletter Handbook on HCFC Phase out and Energy Efficiency in Buildings Industry Exhibition To Upload Poster(s) Awareness Material Posters (10 no.) Pledge Pledge