Causes of ozone layer depletion and its effects on human. The depletion of the ozone describes two closely related but distinct phenomena which have been repeatedly observed since the latter 1970s. I am online and ready to help you via whatsapp chat. Causes of ozone layer depletion the main things that lead to destruction of the ozone gas in the ozone layer. A reduced ozone layer causes a number of serious health risks for. Is depletion of the ozone layer the principal cause of. Read online causes of ozone layer depletion and its effects on human. It is an essential factor for many global, biological and environmental phenomena. Ozone depletion is the term commonly used to describe the thinning of the ozone layer in the stratosphere.
Ozone layer is a deep layer in earths atmosphere called stratosphere that contain ozone which is a naturally. Effects of ozone depletion for humans and the environment. Ozone is a gas that is present in the ozone layer in the stratosphere of the earth. It was agreed on 16 september 1987, and entered into force on 1 january 1989. Solution on ozone layer depletion september 16 was voted the world ozone day in the year 1994 by the united nations general assembly. The latter phenomenon is referred to as the ozone hole. Highly reactive species like hydrogen peroxide is produced which has bad effects on human health. Ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities.
Ozone layer is an international treaty designed to protect the ozone layerby phasing out the production of numerous substances that are responsible forozone depletion. Let us have a detailed look at the various causes and effects of ozone layer depletion. What are the causes and effects of ozone depletion. The term ozone depletion can refer to a number of distinct, but related phenomena.
The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Protection against depletion of stratospheric ozone by. Thinning of the stratospheric ozone layer has been caused largely by. The ozone hole and global warming union of concerned. Although natural phenomena can cause temporary ozone loss, chlorine and bromine released from manmade compounds such as cfcs are now accepted as the main cause of this. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The main molecules that are destroying the ozone layer are called chlorofluorocarbons or cfcs. There have been several concerns about ozone depletion. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95.
Stratospheric ozone depletion has further indirect health effects. The term ozone hole refers to the depletion of the protective ozone layer in the upper atmosphere stratosphere over earths polar regions. Low temperatures, increase in the level of chlorine and bromine gases in the upper stratosphere are some of the reasons that leads to ozone layer depletion. Ozone layer depletion, its causes and its effects ozone. By contrast, annual anthropogenic n 2 o ozone depletion potentialweighted emissions were the fourth most important in the 1980s. There have been large interannual and seasonal variations in all regions of the planet in the density of stratospheric ozone. However, because ozone absorbs solar radiation and is a greenhouse gas, ozone changes and climate change are linked in important ways. The severe depletion of the ozone layer in any particular area is called ozone hole. The main things that lead to destruction of the ozone gas in the ozone layer.
Apr 11, 2020 the thinning or reduction of ozone depletion is most prominent in the polar regions, especially over antarctica. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Unfortunately, this book cant be printed from the openbook. Jan 20, 2010 this yearly occurrence is called the ozone hole. What emissions from human activities lead to ozone. The thinning or reduction of ozone depletion is most prominent in the polar regions, especially over antarctica.
This causes the ozone to break up and become unable to absorb ultraviolet light. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Kerr and mcelroy 1993, caldwell and flint 1994, jokela et al. Ozone layer depletion causes, effects and solutions 7. Ozone depletion facts and information national geographic. If you need to print pages from this book, we recommend downloading it as a pdf. Both are essential for life but air also protects all of us and it is therefore understandable that the response to the depletion of the ozone layer became international. Uv radiations are disturbing developmental and physiological processes which is decreasing the productivity of crops. Ozone depletion is largely a result of manmade substances. Ozone depletion potential an overview sciencedirect topics.
Ozone depletion is allowing the uv radiation to earth surface. The depletion of the ozone layer 1593 words 7 pages. Pdf causes of ozone layer depletion and its effects on. That is, ozone depletion in the upper atmosphere will allow more ultraviolet radi. There are many situations where human activities have. The ozone layer resides in the stratospheric layer of the earths atmosphere. Acute overexposure of the skin to solar uv radiation causes sunburn. Learn more about the process, causes, and effects of ozone layer depletion. Ozone depletion displaying top 8 worksheets found for this concept some of the worksheets for this concept are activity pack for key stages 2 3, tthe ozone hole and global he ozone hole and global global, national aeronautics and the ozone hole space administratio n, the good the bad and the ugly of ozone, causes of ozone layer depletion and its effects on human, ozone. The ozone layer is a belt of the naturallyoccuring gas ozone that sits.
Unlike pollution which has several causes, there is one specific chemical compound that is. The chlorofluorocarbon and the halons are potent ozone depletors. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Mar 21, 2020 ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. Ozone layer depletion ozone layer depletion is the gradual thinning of the earths ozone layer in the upper atmosphere caused due tho release of chemical compounds containing gaseous bromine or chlorine from industries or other human activities. Ozone layer depletion causes increased uv radiation levels at the earths surface, which is damaging to human health. Ozone depletion is primarily caused by human activities. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade.
The thinning is most pronounced in the polar regions, especially over antarctica. Sep 30, 2019 ozone depletion is largely a result of manmade substances. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. The exposure to these radiations is severely affecting all life forms on earth. But it does not cause more than 12% of the ozone layer depletion. Do ozone depleting gases and their substitutes have an effect on climate. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. This depletion makes humans more vulnerable to the uvb rays which are known to cause skin cancer as well as other genetic deformities.
The earth is protected from excessive ultraviolet rays by an atmospheric ozone layer. Project report on ozone depletion environmental pollution. Ozone depletion over india with so much worry about the rapid ozone depletion taking place in various parts of the earth, indian scientists are closely monitoring the ozone layer over india for possible depletion trends. Ozone depletion is the process of destruction of the ozone layer which can cause adverse effects on the living forms by many pollutants releases out from the vehicles, industries etc. It absorbs solar ultraviolet radiation, which heats the stratosphere.
The outcome of this response is decline in the total abundance of cfcs in the atmosphere and trend of gradual healing of ozone layer. What emissions from human activities lead to ozone depletion. Ozone layer depletion daily current affair article for. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth.
There are many causes for ozone depletion, but the most important process in both trends is catalytic destruction of ozone by atomic chlorine and. The earth is protected from excessive ultraviolet rays. There are also springtime polar tropospheric ozone depletion. Ozone depletion and climate change are linked in a number of ways, but ozone depletion is not a major cause of climate change. Generally, we find thinning or depletion of the ozone layer to the extent of ozone hole creation over the southern pole i. However, these cause a very nominal contribution to the ozone layer depletion which is near about 1 to 2 percent and therefore these. Frequently asked questions about the ozone layer ozone. Stratospheric ozone depletion, ultraviolet radiation and health. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. It is found that the ozone layer gets affected by some natural causes that are sunspots and stratospheric winds. The ozone layer helps to protect life from harmful ultraviolet radiation. Humans have introduced gases and chemicals into the atmosphere that have rapidly depleted the ozone layer in the last century. One important effect is that ozone depletion in the stratosphere increases the formation of photochemical smog, including ozone accumulation, in the lower troposphere. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern.
Hence, we should be aware and actions must be taken to ensure that ozone layer is not destroyed. This site is like a library, you could find million book here by using search box in the header. Timeline of stratospheric ozone depletion and observations. In this module, discussion and deliberation on the causes and impacts of ozone depletion are aimed at. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. In our present study, we shall discuss how ozone layer depletion is affecting human health and we shall also discuss some recommendations to minimize ozone depletion and its adverse effects on human health. It is ideal photochemical maker due to its long life and stability 1 34. Depletion of ozone layer is also causing the problem of food shortage to humans. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders. Pdf causes of ozone layer depletion and its effects on human.
People, plants, and animals living under the ozone hole are harmed by the solar radiation now reaching the earths surfacewhere it causes health problems, from eye damage to skin cancer. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. Life on earth has been protected for thousands of years with a vital layer of poison in the atmosphere. Experts blame ozonelayer depletion on manmade chem icals containing chlorine and. Find answers to frequently asked questions about the ozone layer, ozone depletion, and the effects of ozone depletion on health and the environment. The ozone layer has been found to be depleted by certain natural processes such as sunspots and stratospheric winds. The natural distribution of ozone around the earth is. The problems and causes associated with ozone depletion arise from human activities. However, various factors have led to the depletion and damage of this protective layer. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Is depletion of the ozone layer the principal cause of climate change. It turns out that certain types of molecules can cause a chemical reaction when they come in contact with ozone molecules. Ozone depletion consists of two related events observed since the late 1970s.
Ozone layer depletion, its causes and its effects free download as powerpoint presentation. Jul 16, 2008 the term ozone hole refers to the depletion of the protective ozone layer in the upper atmosphere stratosphere over earths polar regions. This proves ozone depletion is a big issue that needs attention. There, it will absorb almost all ultraviolet light which is harmful to many organisms. The ozone hole and global warming union of concerned scientists. Certain industrial processes and consumer products result in the emission of halogen source gases to the atmosphere. Causes, effects and solutions of ozone layer depletion. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Due to stratospheric ozone layer depletion uv radiations are penetrating in earth atmosphere which result in the production of reduced oxygen. Ozone depletion simple english wikipedia, the free. Ozone depletion occurs when the natural balance between the production and destruction of ozone in the stratosphere is tipped in favor of destruction. All books are in clear copy here, and all files are secure so dont worry about it. Ozone itself absorbs uv between 200 and 300 nm light.
Human activity is the major factor in tipping that. Evidence of ozone depletion in the stratosphere began to appear in the 1980s. The layers which occupy the lower part of the atmosphere removes the unwanted pollutants from. The the causes and effects of global ozone depletion have been illuminated in this paper.
Let us see some of the important causes and effects of ozone layer depletion. Ozone layer depletion definition, causes, solutions toppr. No, ozone depletion itself is not the principal cause of climate change. These gases bring chlorine and bromine to the stratosphere, which cause depletion of the ozone layer. There are many causes for ozone depletion, but the most important process in both trends is. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. The ozone layer protects living things from harmful ultraviolet rays from the sun. The treaty is structured around several groups of halogenated hydrocarbonsthat deplete stratospheric. This layer serves as a shield that protects the earth from harmful ultraviolet radiation from the sun. The layers which occupy the lower part of the atmosphere removes the unwanted pollutants from the earths surface. Limiting future n 2 o emissions would enhance the recovery of the ozone layer from its actual state and would also.
Ozone depletion, ozone hole, ultraviolet radiation. Causes and effects of ozone layer depletion that are. The nitrogenous compounds such as no2, no, n2o are highly responsible for the depletion of the ozone layer. Concern about a depleting ozone layer dates back to the 1970s. The ozone depletion resulted in secondary production of an ozone layer near the ground terrestrial ozone layer, which is responsible for adverse effects on plants, humans and environment with. Atmospheric ozone has two effects on the temperature balance of the earth. Ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. Unlike pollution which has several causes, there is one specific chemical compound that is responsible for the breakdown of the ozone layer. Ozone layer depletion cause, effects, and solutions. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozone depleting substances, and sun safety. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozonedepleting substances, and sun safety. Stratospheric ozone depletion, ultraviolet radiation and.
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