Ozone Layer A General Study - Usman, Ibrahim Afandi
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Imagine a typical Hollywood "gotcha" film. The plot involves the discovery that the apparent "bad guy" is in fact the "good guy," and that the seemingly nice guy is in fact a fiendishly evil genius. This is the case with ozone and chlorofluorocarbons. Ozone is a molecule consisting of three oxygen- atoms. Its chemical notation is O3. Ozone is a "bad guy" in that breathing it is lethal at dosage levels of a few molecules per million air molecules. This is why ozone at the surface is referred to as a pollutant. Yet ozone high in the atmosphere screens out biologically harmful solar ultraviolet…mehr

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Imagine a typical Hollywood "gotcha" film. The plot involves the discovery that the apparent "bad guy" is in fact the "good guy," and that the seemingly nice guy is in fact a fiendishly evil genius. This is the case with ozone and chlorofluorocarbons. Ozone is a molecule consisting of three oxygen- atoms. Its chemical notation is O3. Ozone is a "bad guy" in that breathing it is lethal at dosage levels of a few molecules per million air molecules. This is why ozone at the surface is referred to as a pollutant. Yet ozone high in the atmosphere screens out biologically harmful solar ultraviolet radiation, keeping it from reaching the surface. Such ultraviolet radiation is destructive of genetic cellular material in plants and animals, as well as human beings. Without the "ozone layer" high up in the atmosphere, life on the surface of the Earth would not be possible as we know it.