Are you looking for seminar for ozone layer depletion. Introduction under the montreal protocol on substances that deplete the ozone layer, article 7 of the protocol. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. As a result, the realistic effects of ozone depletion cannot be examined, but the mechanism of chlorine catalyzed destruction of ozone can be understood and observed. The natural distribution of ozone around the earth is.
Ppt ozone layer depletion powerpoint presentation free to. Powerpoint is the worlds most popular presentation software which can let you create professional depletion of ozone layer powerpoint presentation easily and in no time. When there was no ozone layer, life could only exist in the sea. The state of scientific understanding regarding the ozonedepletion issue has advanced in recent years as a result of the concerted efforts of hundreds of scientists worldwide. The focus of this environmental awareness training manual and course instruction is on the reduction and elimination of emissions of regulated refrigerants into the atmosphere. The first stage involves the emergence of stratospheric ozone depletion as a domestic issue in the united states and several other countries in the 1970s, while the second stage focuses on its transformation to an international issue in the 1980s. Gwp is a relative value of the global warming effect caused by a chemical substance by unit weight emitted to the.
Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Ozone in the lower atmosphere contributes to global warming and climate change. Ozone depletion, gradual thinning of earths ozone layer caused by the release of chemical compounds containing gaseous chlorine or. Explore ozone water treatment with free download of seminar report and ppt in pdf and doc format.
These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. It is always important to protect oneself against uvb, even in the absence of ozone depletion, by wearing hats, sunglasses, and sunscreen. Ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. The ozone layer protects the earth against most uvb coming from the sun. There, it will absorb almost all ultraviolet light which is harmful to many organisms. Besides carbon dioxide, other greenhouse gases are methane, water vapour, nitrous oxide, cfcs and ozone. Environmental awareness training manual for ozone depleting. Ozone depletion ozone depletion chlorofluorocarbon. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. The evolution of stratospheric ozone depletion policy can best be understood as a twostage process. It shields the entire earth frommuch of the harmful uv radiationthat comes from the sun 3. Let us have a detailed look at the various causes and effects of ozone layer depletion.
The typical conditions of the stratosphere 30 km above the earths surface are 300. Normal ozone ozone layer depletion and its effects. Effects of ozone depletion ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Ozone depletion free download as powerpoint presentation. Ozone layer depletion penn state college of earth and. The stratosphere is home to the ozone layer that protects life on earth from intense ultraviolet radiation. Ozone layer depletion is one of the most serious problems faced by our planet earth. Mar 21, 2020 ozone depletion, gradual thinning of earth s 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 and environment ozone o3 a gas composed of three atoms of oxygen bluish gas that is harmful to breathe nearly 90% of the earths ozone is in the stratosphere and is referred to as the ozone layer ozone absorbs a band of ultraviolet radiation called uvb ozone depleting substances ods. National seminar on plant science and human welfare. It is also one of the prime reasons which are leading to global warming. Pdf ozone depletiona warning of global warming researchgate. The thinning is most pronounced in the polar regions, especially over antarctica.
In addition to the emergence of stratospheric ozone depletion as an international political issue, three other factors. We collected most searched pages list related with seminar for ozone layer depletion and more about it. Ozone layer depletion cause, effects, and solutions. The so 2f 2 global background mixing ratio increased during recent decades and had reached about 1. This quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. Pdf causes of ozone layer depletion and its effects on. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. Ozone depletion, gradual thinning of earth s 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 depletion ozone depletion chlorofluorocarbon free. Policy responses to ozone depletion mario molina and sherwood rowland showed in 1974 that cfc gases destroy ozone coordinating committee on ozone layer ccol established by unep in the 1970s vienna convention for the protection of the ozone layer held in 1985 montreal protocol to ban substances that deplete the ozone layer held in 1987 amendments to the. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade. However, if you would like to change the initial conditions of the system, you might find out that the time threshold will be reduced or augmented.
Ozone and environment ozone o3 a gas composed of three atoms of oxygen bluish gas that is harmful to breathe nearly 90% of the earths ozone is in the stratosphere and is referred to as the ozone layer ozone absorbs a band of ultraviolet radiation called uvb ozonedepleting substances ods. Our powerpoint presentation about ozone depletion, its effects and its causes. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. If interested, you can purchase this powerpoint from my online store. The ozone layer is mainly found in the lower portion of the stratosphere.
Its consequences, the causal debate, and international cooperation number 6 february 8, 1988 since the announcement of a thinning of the ozone layer over the antarctic by uk scientists in 1985, world attention has been focusing on the causes of this phenomenon. Why the hole in the atmospheric ozone layer above us. Ozone layer depletion ozone layer depletion the effect on the world the effect of ozone layer depletion often seems as if it is a far away problem, given that the actual holes in this protective blanket over the earths atmosphere are concentrated around the poles and far from most human settlements. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. Ozone depletion simple english wikipedia, the free. Ozone gas is perceptibly blue in colour and has a characteristic pungent smell. Near the ground, ozone forming as a result of chemical reactions involving traffic pollution and sunlight may cause a number of respiratory problems, particularly for young children. The state of scientific understanding regarding the ozone depletion issue has advanced in recent years as a result of the concerted efforts of hundreds of scientists worldwide.
Jun, 2017 our study shows that ozone depletion was in the past a key driver of climate change in the tropical regions of the pacific, says stefan bronnimann, and in the same way, the recovery of the. Ozone water treatment seminar report, ppt, pdf for mechanical. In addition, increased surface uv leads to increased tropospheric ozone, which is a health risk to humans. It contains some videos and gif at thte end from an external source. Causes of ozone layer depletion and its effects on human.
Ozone depletion facts and information national geographic. Ozone layer depletion causes, effects and solutions. Ozone is a gas that is present in the ozone layer in the stratosphere of the earth. Ozone depletion simple english wikipedia, the free encyclopedia. The role of ozone depletion in australias changing climate pdf 9. Ozone layer depletion cause, effects, and solutions biology. We collected most searched pages list related with seminar. When there was no ozone layer, life could only exist in. Ozone depletion would magnify all of the effects of uv on human health, both positive including production of vitamin d and negative including sunburn, skin cancer, and cataracts. The troposphere is the layer where most weather activity. Project report on ozone depletion environmental pollution.
The earths ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30. A free powerpoint ppt presentation displayed as a flash slide show on id. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Ozone depletion and climate change environment canada. Ozone layer is a thin, fragileshield that contains relatively highconcentrations of ozone.
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. Odp is a relative value of the ozone destructive potential of a chemical substance by unit weight emitted into atmosphere, with the unit weight of cfc11 as 1. The increase of ultraviolet light due to depletion of the ozone layer will not only have adverse. Also explore the seminar topics paper on ozone water treatment with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. Experts blame ozonelayer depletion on manmade chem icals open source pdf creator containing. Environmental awareness training and certification is required under the manitoba ozone depleting substances and other halocarbons regulation mr 10394. Health and environmental effects of ozone layer depletion.
This timeline highlights the average area of the ozone hole between september 7th and october th as observed by nasa spacedbased instruments see colored bars and scale. Depletion of the ozone layer increase in harmful ultraviolet light depletion of ozone layer chlorine reacts with o3 in the ozone depletion of the ozone layer impact on human body and ecosystems ozone layer depletion incoming harmful ultraviolet light depletion chain reaction q. Ozone layer depletion, its causes and its effects ozone. Management of ozone depleting substances reported to the toxics release inventory katherine sleasman u. Class i substances are considered to have the most significant impact on ozone layer depletion. Dec 28, 2016 the ozone layer protects the earth against most uvb coming from the sun. Unlike oxygen o2, ozone has a strong scent and is blue in color.
There are important effects of changes in the intensity of solar uv radiation resulting from stratospheric ozone depletion, particularly uvb. Ozone layer is a layer in the earths atmosphere which contains relatively high concentration of ozone. However, these precautions will become more important as ozone depletion worsens. A seminar on the depletion of the ozone layer, presented by ozoagu peter cj. The purpose of this seminar is to help article 5 countries smoothly phase out ods such as cfcs. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. Ozone water treatment seminar report, ppt, pdf for. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. It covers the entire planet and protects life on earth by absorbing harmful ultravioletb uvb radiation from the sun. The term ozone depletion can refer to a number of distinct, but related phenomena. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. Protecting the ozone layer and reducing global warming undp. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. Ppt a seminar on the depletion of the ozone layer, presented by.
Progress report 2003 united nations environment programme, environmental e. Jul 02, 2015 this quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. This environmental awareness training manual for ozone depleting substances ods and other halocarbons is intended to be an instructional resource for persons requiring certification in accordance with manitobas ozone depleting substances management program as mandated under the manitoba ozone depleting substances and other. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. Environmental chemistry 401 carbon dioxide crosses the delicate proportion of 0. Management of ozonedepleting substances reported to the toxics release inventory katherine sleasman u. Ozone layer depletion causes, effects and solutions 7.
Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone. Policy responses to ozone depletion mario molina and sherwood rowland showed in 1974 that cfc gases destroy ozone coordinating committee on ozone layer ccol established by unep in the 1970s vienna convention for the protection of the ozone layer held in 1985 montreal protocol to ban substances that deplete the ozone layer held in 1987. Ozone depletion potentials odps were a very important measure in the formulation of the montreal protocol and its amendments. Carbon dioxide is the major contributor to global warming. The ozone layer helps to protect life from harmful ultraviolet radiation. Environmental chemistry national council of educational.
Ppt ozone layer depletion powerpoint presentation free. Ozone absorbs a band of ultraviolet radiation called uvb. Management of ozonedepleting substances reported to the. This helps you give your presentation on depletion of ozone layer in a conference, a school lecture, a business proposal, in a webinar and business and professional.
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