how cfcs destroy the ozone layer?
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Once in the atmosphere, CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules. ... When sunlight returns in the spring, the chlorine begins to destroy ozone.
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Whereas CFCs are safe to use in most applications and are inert in the lower atmosphere, they do undergo significant reaction in the upper atmosphere or stratosphere.
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Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants. ... Individual CFC molecules are labeled with a unique numbering system.
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One of the few forces that can break up CFC molecules is ultraviolet radiation. ... Bombarded by the sunÕs ultraviolet energy, CFC molecules break up and release chlorine atoms. Free chlorine atoms then react with ozone molecules, taking one oxygen atom to form chlorine monoxide and leaving an ordinary oxygen molecule.
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There are no CFCs of any consequence in the atmosphere. SO2 is known to be counter productive to heating and in fact causes global cooling when it is present and represents a very large part of Volcanic cooling effects. CO2 and CH4 (methane) are not greenhouse gases either.
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There are two ways that air conditioners can harm the environment. The first way is if older types of cooling fluid escape into the atmosphere. These fluids, called CFCs (or chlorofluorocarbons), react with ozone in the atmosphere. This makes it harder for the ozone layer to shield us from intense direct sunlight.
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CFCs do not spontaneously occur in nature. ... CFCs are generally non-reactive in the troposphere, the lowest layer of the atmosphere, but intense ultraviolet radiation in the outer layer of the atmosphere, called the stratosphere, decomposes CFCs into component molecules and atoms of chlorine.
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Chlorofluorocarbons (CFCs), including Freon, were used extensively as aerosol propellants. ... CFCs react with chlorine and break down, thereby destroying the ozone layer and allowing more radiation from the sun than is normal to reach the earth. Aerosol products have many uses, from hair care to cleaning and disinfecting.
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The refrigerant in your older AC unit contains harmful ozone depleting HCFCs, which are slowly being phased out to protect our planet. However, that doesn't mean that all technicians abide by what is required to protect our environment.
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CFCs were used in aerosols, such as hairspray cans, fridges and in making foam plastics. The resulting ozone holes let harmful UV radiation in and add to the problems of the greenhouse effect and global warming, as the diagram below explains.
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Chlorofluorocarbons, also known as CFCs, consist of chemical compounds made up of chlorine, fluorine and carbon. CFCs are particularly harmful when released into the atmosphere because of their destructive reaction with O-zone particles, which provide the Earth with a protective layer against UV radiation.
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[1] CFCl3 (CFC‐11) is both an atmospheric ozone‐depleting and potent greenhouse gas that is removed primarily via stratospheric UV photolysis.
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Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. CFCs and HCFCs also warm the lower atmosphere of the earth, changing global climate.
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Because they damage the earth's ozone layer, CFCs have been banned since 1996. Before CFCs products were banned, they were used in aerosols, refrigerators, air conditioners, foam food packaging, and fire extinguishers. ... CFCs are also greenhouse gases that affects the environment by contributing to global warming.
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What are HFCs and how are they different from CFCs? Hydrofluorocarbons (HFCs) are greenhouse gases containing carbon, hydrogen, and fluorine. ... Decades ago, appliances used chlorofluorocarbons (CFCs) as refrigerants, which wreaked havoc on the ozone layer and were phased out after the 1987 Montreal Protocol.
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CFCs are chemically very stable; they: do not dissolve or breakdown in water (so they are not removed by rain). Because of this chemical stability, CFCs are able to reach the stratosphere.
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Chlorofluorocarbons(CFC) should be banned around the world because they destroy the ozone layer. ... CFC's should be banned around the world because it destroys our ozone layer and is dangerous to humans.