In 1994, the UN General Assembly proclaimed 16 September the International Day for the Preservation of the Ozone Layer, commemorating the date of the signing, in 1987, of the Montreal Protocol on Substances that Deplete the Ozone Layer (resolution 49/114).
The theme of International Day for the Preservation of the Ozone layer 2013 is "A healthy atmosphere, the future we want" . The ozone layer, a fragile shield of gas, protects the Earth from the harmful portion of the rays of the sun, thus helping preserve life on the planet.
Member Nations of United Nations devote this day for the promotional activities for the preservation of Ozone layer.
Secretary-General of United Nation on the International Day for the Preservation of the Ozone Layer-2013 said, “"Extraordinary challenges require extraordinary responses. A generation ago, the world’s nations agreed to act definitively to protect the ozone layer, initiating an inter-governmental process that blazed new trails. "
The phaseout of controlled uses of ozone depleting substances and the related reductions have not only helped protect the ozone layer for this and future generations, but have also contributed significantly to global efforts to address climate change; furthermore, it has protected human health and ecosystems by limiting the harmful ultraviolet radiation from reaching the earth.