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VAGARIES DEPLETION OF OZONE LAYER AYUSH JAISWAL B. Com. Final Year Student, Vanasthali PG College, Ahraura, Mirzapur – 231301 UP. Email: [email protected] Cell number: 7275334484 ABSTRACT Depletion of ozone layer is one of the critical environmental issues. Ozone layer is a stratospheric layer that plays an important role in providing support to humans for their survival because it filters out incoming radiation from the Sun i.e., Ultraviolet rays, without which human health and environment are effected. Ultraviolet radiations are high energy electromagnetic waves released by the sun which if enters the earth’s atmosphere can lead to various environmental issues including global warming. Various gases such as CFCs (Chlorofluorocarbons), HCFCs (hydro chlorofluorocarbons) and other organo-halogens produced by a myriad of human activities contributes to depletion of ozone layer that results in negatively affecting the plants, humans and the whole environment or ecological balance besides increasing the number of respiratory diseases in humans. The cause of UV rays also decreases the crop production. However UV rays is required in optimum intensity for both plant and animals. The objective of this paper is to review the origin, causes, and effects of ozone layer depletion as well as its protective measures. KEYWORDS: Ozone Depletion, Global warming, ultraviolet radiations, CFCs, HCFCs, Respiratory problems, plant system.