The Ozone Layer.

I. The Ozone Layer The Earths atmosphere is divided into several layers. The lowest region, the troposphere, extends from the Earths locate up to about 10 kilometers (km) in altitude. The next layer, the stratosphere, continues from 10 km to about 50 km. Most atmospheric ozone is turn in a layer in the stratosphere, about 15-30 kilometers supra the Earths surface. Ozone is a molecule containing three oxygen atoms. It is blue in disguise and has a strong odor. Normal oxygen, which we breathe, has two oxygen atoms and is dull and odorless. Ozone is much less common than normal oxygen. tabu of each(prenominal) 10 one million million million aerate molecules, about 2 million ar normal oxygen, but only 3 are ozone. However, even the small bar of ozone plays a key subroutine in the atmosphere. The ozone layer absorbs a portion of the radiation from the sun, preventing it from stretchiness the planets surface. Most importantly, it absorbs the portion of invisible light call ed UVB. UVB has been linked to umpteen harmful effects, including various types of genuflect cancer, cataracts, and harm to some crops, certain materials, and some forms of marine life. At any given time, ozone molecules are unceasingly formed and undone in the stratosphere. The total amount, however, remains comparatively stable. While ozone concentrations quit essentially with sunspots, the seasons, and latitude, these processes are well still and predictable. Each natural reduction in ozone levels has been followed by a recovery. Recently, however, convincing scientific evidence has shown that the ozone shield is being depleted well beyond changes due to natural processes. II. Ozone Depletion For over 50 years, chlorofluorocarbons, or CFCs, were view of as miracle substances. They are stable, nonflammable, low in toxicity, and inexpensive to produce. all over time, CFCs found uses as refrigerants, solvents, foam blowing... If you require to get a full essay, order it on o! ur website: OrderCustomPaper.com

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