Ozone in the Earth�s atmosphere is a particularly critical gas for the survival of our planet. The Earth�s atmosphere serves three critical functions: it sustains life-giving oxygen, maintains the Earth�s warmth, and protects plants and animals from harmful, potentially deadly, ultraviolet (UV) radiation from the sun. Ozone is essential because it plays two major roles: in the lower atmosphere it adds to the greenhouse gases, keeping the earth warm, however it serves a more critical function in the upper atmosphere, also known as the stratosphere, where it �keeps 95-99% of the suns ultraviolet radiation from reaching the Earth�s surface� (Purves 98). Therefore a number of consequences can result from increased levels of UV radiation striking the Earth. Human society�s emissions of halocarbons have caused a serious thinning of the Earth�s stratospheric ozone layer; as a result, stopping ozone layer depletion is one of the most critical challenges facing the world today. The ozone layer is truly a conserver of life, essential to the survival of generally all living things. There are a ......

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