The Ozone Layer.

I. The Ozone Layer The Earths atmosphere is divided into several(prenominal) layers. The lowest region, the troposphere, extends from the Earths surface up to virtually 10 kilometers (km) in altitude. The next layer, the stratosphere, continues from 10 km to about 50 km. closely atmospheric ozone is concentrated in a layer in the stratosphere, about 15-30 kilometers above the Earths surface. Ozone is a molecule containing three group O atoms. It is blue in cloak and has a strong odor. modal(prenominal) oxygen, which we breathe, has two oxygen atoms and is softened and odorless. Ozone is much less usual than normal oxygen. Out of each(prenominal) 10 one one million million million million million air molecules, about 2 million ar normal oxygen, but provided 3 be ozone. However, thus far the small amount of ozone plays a key subroutine in the atmosphere. The ozone layer absorbs a put of the radiation from the sun, preventing it from stretchiness the planets surface. around importantly, it absorbs the portion of ultraviolet leisurely called UVB. UVB has been linked to umpteen deleterious effects, including various types of skin cancer, cataracts, and vilify to most crops, certain materials, and some forms of marine life. At any given up time, ozone molecules argon unceasingly create and destroyed in the stratosphere. The append amount, however, remains comparatively stable.

succession ozone concentrations vary earthyly with sunspots, the seasons, and latitude, these processes are easily still and predictable. from each one natural reduction in ozone levels has been followed by a recovery. Recently, however, convert scientific evidence has shown that the ozone apology is being depleted well beyond changes due to natural processes. II. Ozone Depletion For over 50 years, chlorofluorocarbons, or CFCs, were thought of as miracle substances. They are stable, nonflammable, low in toxicity, and catchpenny(prenominal) to produce. Over time, CFCs found uses as refrigerants, solvents, foam blowing... If you require to besot a full essay, enounce it on our website: Orderessay

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