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When is the International Day for the Preservation of the Ozone Layer, recognized by the UN observed?
International Day for the Preservation of the Ozone Layer is observed on -
When is 'International Day for the Preservation of the Ozone Layer' observed?
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
Which layer of of atmosphere contains the ozone layer?
Which day is observed as International day of Peace Day? (বিশ্ব শান্তি দিবস কোন দিনে পালিত হয়? )
Name the international treaty designed to protect the ozone layer from CFCs.
According to International Diabetes Federation . which day is observed as 'World Diabetes Day's ?
International Literacy Day is observed on which day?
The day of the previous day of yesterday is the next day of the days before yesterday, Which is the fourth day of Tuesday . what is the day today.