The Vienna Conference was the first international conference on ozone depletion . It was held in Vienna, Austria in 1985 when a hole in the stratospheric ozone layer was observed in the South Pole marked by increased UV-B infiltration over Antarctica. A ‘hole’, marked by significant drop in ozone molecules in the layer, as wide as that of United States was discovered by a British team. The Vienna Convention for the Protection of Ozone Layer was agreed at the conference and it entered into force in 1987.
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