Ozone layer depletion is simply the wearing out reduction of the amount of ozone in the stratosphere. In addition, increased surface uv leads to increased tropospheric ozone, which is a health risk to humans. Ozone depletion project pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. These rays also have adverse effects on plant growth, thus reducing agricultural productivity. Industries that manufacture things like insulating foams, solvents, soaps, cooling things like air conditioners. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. The production and emission of chlorofluorocarbons cfcs, is the leading cause of ozone layer depletion.
There are many situations where human activities have. Although natural phenomenon can cause ozone depletion but human activities such as cfcs are now accepted as major cause of depletion 9. Together, they describe what ozone, the ozone layer, ozone depletion and the ozone hole are, how ozone depletion occurs, mankinds influence, its impacts, and. Ozone layer depletion and its ill effects in australia.
Resource depletion is when humans use a resource at a rate thats not sustainable, or when the resource cannot be replenished fast enough. But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons cfcs. It is caused directly or indirectly by anthropogenic activities that extract various environmental resources at a faster rate than they are replaced, and thus depleting them. Ozone layer depletion is the thinning of ozone layer that protects the earth from the harmful uv radiations. Ozone is a rare form of oxygen that is composed of three o 3 rather than two atoms o 2 as is true of the vast majority of oxygen in the atmosphere. The envelope of air or different types of gases surrounding the earth is known as atmosphere. Progress report 2003 united nations environment programme, environmental e. Cfcs account for almost 80% of the total depletion of ozone. B dobson inferred correctly that the cause of the warm stratosphere was heating by the absorption of ultraviolet solar radiation by ozone, and he set out to.
Case study on ozone layer ozone depletion chlorofluorocarbon. Amounts of biodiversity and geodiversity essential for our survival satisfying our needs 3. The chlorofluorocarbon and the halons are potent ozone depletors. 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. Tropospheric ozone is a pollutant a secondary pollutant that causes difficulty breathing and prolonged lung health issues, it disperses quickly and is not in nearly as high concentrations as strasopheric ozone, the ozone shield that protects life from harmful ultraviolet light. But many researchers do not agree with these predictions,14 and express their. Global ozone research and monitoring projectreport no. Case study on ozone layer free download as powerpoint presentation. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. It is a very aggressive cancer and quickly grows inwards and causes secondary tumours to grow on the internal organs. Pdf the effects of resource depletion on the productivity.
Ozone exists primarily in two distinct layers of the atmosphere. Case study depletion of ozone in the atmosphere the work of g. Normal resources are usually isolated between inexhaustible resources and nonsustainable resources. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Evaluating natural source zone depletion at sites with lnapl. Polycrystalline silicon, also called polysilicon, is a material consisting of small silicon crystals. This greenhouse gas traps heat in the atmosphere and contributes to climate change, a process that affects weather patterns, water resources and the survival of. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing 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. One of the main reasons for the widespread concern about. This paper reveals the causes of ozone depletion, identifies the sources of ozone depleting. Reduced water quality affects humans and animals by reducing the amount of healthy and safe drinking water, while the rapid use of fossil fuels introduces foreign and harmful toxins into waterways, the ground and the atmosphere, and affects human populations by. With depletion in ozones layer, we humans are more prone to uv rays that reaches the earths surface. Protecting the ozone layer department of the environment.
Global warming is linked to ozone layer depletion in 2 ways. The passive co 2 flux trap method was developed specifically to monitor nszd using a stoichiometric conversion of the rate of co 2 efflux from lnapl degradation mccoy et al. The effects of natural resource depletion vary depending on the type of resource. May 16, 2016 ozone layer depletion and its ill effects in australia. Environmental degradation comes about due to erosion and decline of the quality of the natural environment. Its presence in the lower atmosphere closer to earth contributes to air pollution and causes damage to human tissues. Resource depletion is the utilization of a resource quicker than it can be renewed. Furthermore, this causes the presence of ozone in the lower atmosphere which is considered to be a pollutant. But its presence in the outer reaches of the earths atmosphere is absolutely vital to life. A little discussed but very important example is phosphate. 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 depletion is primarily caused by human activities.
The main causes identified for depletion of resources are. See discussions, stats, and author profiles for this publication at. Almost all physical, chemical, biological and other activities are responsible for environmental degradation. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. Depletion of this layer by ozone depleting substances ods will lead to higher uvb levels, which in turn will cause increased skin cancers and cataracts and potential damage to some marine organisms, plants, and plastics. Natural causes of ozone depletion ozone depletion describes two distinct, but related observations. Ozone is a form of oxygen that is present in the earths atmosphere in small quantity.
Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. The ozone layer helps to protect life from harmful ultraviolet radiation. More people means more pollution, which can exacerbate the depletion of natural resources. Polysilicon depletion effect is the phenomenon in which unwanted variation of threshold voltage of the mosfet devices using polysilicon as gate material is observed, leading to unpredicted behavior of the electronic circuit. Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment. Some of the authors of this publication are also working on these related projects. What are causes and effects of environmental degradation. Nonrenewable resources, like coal, oil, and gas, always. Ozone depletion facts and information national geographic. For example, when fossil fuels are burned to generate power, carbon dioxide is released. Unfortunately, lnapls have historically posed a significant challenge to site.
Polycrystalline silicon, also called polysilicon, is. It is an essential factor for many global, biological and environmental phenomena. B dobson and other scientists in measuring concentrations of chloride and ozone in the atmosphere g. 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. Another negative effect of a thinning ozone layer is the reduced lifespan of certain materials such as certain plastics. Health and environmental effects of ozone layer depletion. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. The main things that lead to destruction of the ozone gas in the ozone layer. Depletion of the ozone layer results in increased uv. Regarding ozone layer depletion, the answer is simple. A combination of low temperatures, elevated chlorine, and bromine concentrations in the upper stratosphere are responsible for the destruction of ozone. Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. Causes of ozone layer depletion and its effects on human.
The depletion of ozone layer triggers a decrease in the ozone gas from the stratosphere. The thinning is most pronounced in the polar regions, especially over antarctica. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. Scribd is the worlds largest social reading and publishing site. Effects of uv rays on aquatic ecosystems ozone depletion causes increases in uv rayss effects on aquatic ecosystems by. What are the effects of natural resource depletion. It makes a layer in the atmosphere which acts as a cover to the earth against ultraviolet radiation of the sun. 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. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. Chlorofluorocarbons ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is disturbed. Introduction numerous sites across the country are impacted with light, nonaqueousphase liquids lnapls. Utilization of both of these types of resources past their rate of. Natural resource materials and components found within the environment.
Tina kicked the ball to michael, but she kicked it too hard. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. Lnapl recovery is often a default or presumptive remedial objective in most regulatory programs. Ozone layer depletion causes, effects and solutions 7. Appendix b natural source zone depletion nszd appendix. However, various factors have led to the depletion and damage of this protective layer. Learn more about the process, causes, and effects of ozone layer depletion. Causes, effects and solutions of ozone layer depletion.
Ozone layer depletion cause, effects, and solutions. Causes and effects of ozone layer depletion that are. What are the causes and effects of ozone depletion. 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. Ozone in the lower atmosphere fuels the damaging effects of climate change. The world meteorological or ganization wmo, 1995 predicted that the depletion of the ozone layer peaked around 1998 and the layer would slowly recover by 2045 12. 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. The series is divided into three sections the science of ozone depletion 10, the impacts of ozone depletion 6, and managing ozone depletion 4. Review article in atmospheric and climate sciences january 2016 doi. Twenty questions and answers about the ozone layer. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Ozone layer depletion increases the amount of uvb that reaches the earths surface.