Every year September 16 is observed as the World Ozone Day, marking the signing day of the Montreal Protocol. In late 1970s, American chemists F. Sherwood Rowland and Mario Molina proved that CFC (Chlorofluorocarbons) compounds used in refrigerators, aerosol cans and air conditioners combine with solar radiation and decompose in the stratospheric layer, freeing chlorine and chlorine monoxide atoms which have the potential to destroy large numbers of ozone molecules. Then, a huge hole in the ozone layer was observed over Antarctica in the year 1985, allowing dangerous level of UV radiation to reach the earth’s surface. In the same year Vienna Convention for the Protection of Ozone Layer was also signed under which UN members realized the fundamental significance of curbing damage to the ozone layer. The Vienna convention summarises states’ duties to shield human health and environment against adverse impacts of ozone depletion, established the framework under which the Montreal Proto
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