Groundwater depletion is primarily caused by sustained groundwater pumping. Pdf causes of ozone layer depletion and its effects on. Causes and effects of ozone layer depletion that are. Vivert1448 priyanka n jeevan 1446 1453 rekha 1445 shabnam 1447. What is an ozone hole and causes and effects of ozone depletion. The ozone layer protects us from excessive levels of harmful ultraviolet uv radiation. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. Its presence in the lower atmosphere closer to earth contributes to air pollution and causes damage to human tissues. Man has tried hard to deploy protective measures towards controlling the ozone layer from depletion,but this is so. Ozone layer depletion cause, effects, and solutions.
Progress report 2003 united nations environment programme, environmental e. Ozone layer depletion and its ill effects in australia. Ozone depletion facts and information national geographic. There have been several concerns about ozone depletion. May 03, 2017 ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. Oct 27, 2017 the effects of ozone depletion on plants and animals massive amounts of uvb radiation that penetrate our atmosphere do not only affect humans, but also animals and plants. There are many situations where human activities have. The series is divided into three sections the science of ozone depletion 10, the impacts of ozone depletion 6, and managing ozone depletion 4. Climate change and stratospheric ozone depletion early effects on. The ozone layer is a belt of the naturallyoccuring gas ozone that sits at an altitude of between 15 and 30 kilometers above the earth. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone.
The proteins cells in plants undergo harmful mutations, all due to ultraviolet radiations. Ozone depletion simple english wikipedia, the free encyclopedia. Rivm report 481505011 technical report on stratospheric ozone. In fact, in the 1980s, the phenomenon of ozone depletion was discovered when it was found that there was actually a hole in the ozone layer above antarctica. It is present in traces less than 1 ppm in the atmosphere. The natural distribution of ozone around the earth is.
Uv is also linked to cataracts a disease of the eye. The envelope of air or different types of gases surrounding the earth is known as atmosphere. However, various factors have led to the depletion and damage of this protective layer. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Nonrenewable resources, like coal, oil, and gas, always.
Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment. Studies have argued that the influence of 7,500 tons of chlorine from cfc amounting annually to the stratosphere is minimal compared to 600 million tons of chlorine and fluorine other aggressive gas like salts escaping oceans as aerosols. Polycrystalline silicon, also called polysilicon, is a material consisting of small silicon crystals. It takes years for cfcs and other ozonedepleting compounds to reach the stratosphere. Causes and effects of stratospheric ozone reduction. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause. The latest ozone layer depletion news is included at the foot of the page. The ozone layer functions as a protective screen, filtering out most of the suns harmful ultraviolet uv rays. The effects of ozone depletion on your skin and eyes there are many complicated implications of climate change, but one consequence that has been indisputably measured is the depletion of the ozone layer. Oct 12, 2017 along the years, many environmentalists and scientists have been wondering about what causes ozone depletion. In fact stratospheric ozone layer has the ability to filter the uv radiations. The causes of ozone layer depletion are almost all man made. Maybe we do not realize this, but ozone layer depletion is a severe problem that affects our whole planet.
May 16, 2016 ozone layer depletion and its ill effects in australia. Let us have a detailed look at the various causes and effects of ozone layer depletion. Resource depletion, climate change, and economic growth. Stratospheric ozone depletion leads to an increase in uvb that reach the earths surface, where it can disrupt biological processes and damage a number of materials the fact that uvb can cause biological effects is well demonstrated by the familiar sunburn that follows overexposure to the sun. Jan 20, 2010 the montreal protocol is an international agreement to address the causes of ozone depletion.
The ozone layer protects the surface of the earth and its phenomena from stray rays from the sun. Health effects of stratospheric ozone depletion 53. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in.
What is an ozone hole and causes and effects of ozone. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. 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. Uv a is a low energy form of uv and has only minimal biological effects. The increase of ultraviolet light due to depletion of the ozone layer will not only.
The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. They have been debating this problem and its causes for a while now, trying to diminish the effects of climate change. Apr 27, 2017 learn about ozone depletion, its causes, and effects. Ozone layer depletion effects on the environment effects on nonhuman animals a november 2010 report by scientists at the institute of zoology in london found that whales off the coast of california have shown a sharp rise in sun damage, and these scientists fear that the thinning ozone layer is to blame. 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. It allows only the required doses of the suns solar energy to reach the earths surface. The term ozone depletion can refer to a number of distinct, but related phenomena. Many of them can persist in the stratosphere for centuries. 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, its causes, effects and control.
Ozone depletion simple english wikipedia, the free. It is used for sterilization of water, removal of unpleasant odors and has very positicos treatments results in different ailments from ozone therapy. Causes, effects and solutions of ozone layer depletion. It is an essential factor for many global, biological and environmental phenomena. One of the main reasons for the widespread concern about. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. Effects of uv rays on aquatic ecosystems ozone depletion causes increases in uv rayss effects on aquatic ecosystems by. Like an infection that grows more and more virulent, the continent size hole in earths. Ozone is a form of oxygen that is present in the earths atmosphere in small quantity. 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 is a gas that is present in the ozone layer in the stratosphere of the earth. Ozone depletion is primarily caused by human activities.
Ozone layer depletion causes, effects and solutions 7. Ultra violet radiation uvr is high energy electromagnetic wave emitted from the sun. A description of the state of the ozone layer and the causes and effects have recently. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. How does ozone depletion affect uv levels and life on earth. Health and environmental effects of ozone layer depletion. The problems and causes associated with ozone depletion arise from human activities. Health and environmental effects of ozone layer depletion epa. The chlorofluorocarbon and the halons are potent ozone depletors. What are the causes and effects of ozone depletion. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. With depletion in ozones layer, we humans are more prone to uv rays that reaches the earths surface. Unfortunately, the ozone layer is currently under threat by manmade chemicals that remain in the atmosphere from their widespread use prior to being banned throughout most of the developed world in january 1996.
Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade. Learn more about the process, causes, and effects of ozone layer depletion. A reduced ozone layer causes a number of serious health risks for. In addition, the sources of ozone depleting substances and the mechanism of ozone depletion have been. Research confirms that high levels of uv rays cause nonmelanoma skin cancer. Indirect changes caused by uvb such as changes in plant form, how nutrients are distributed within the plant, timing of developmental phases. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. However, variability due to natural causes, such as volcanic eruptions, precludes similar conclusions for later months when the uv radiation is higher and of. No one knows for certain how much more ozone depletion will occur. Some of the negative effects of groundwater depletion.
Not affected by ozone depletion at typical levels any depletion merely causes uvc to penetrate more deeply into the atmosphere, but still not reach ground level. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. The place of climate change in resource depletion may not be intuitive to. The main things that lead to destruction of the ozone gas in the ozone layer. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. This typically results from higher uv levels reaching us on earth. Ozone layer depletion causes and effects of ozone layer. 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. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. The effects of ozone layer depletion are as follows. Ozone is the layer present in stratosphere which protects the life on earth from harmful effects of uv radiations. Scribd is the worlds largest social reading and publishing site. The most harmful effects of ozone depletion greentumble.
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. One of the primary functions of the ozone layer is to filter out the majority of solar uv radiation that can reach the earths surface. Like an infection that grows more and more virulent, the continentsize hole in earths. Resource depletion is when humans use a resource at a rate thats not sustainable, or when the resource cannot be replenished fast enough. Ozone layer depletion is the thinning of ozone layer that protects the earth from the harmful uv radiations.
While several substances were addressed, chcs and hcfcs were the main ones that the international. Download a pdf of the ozone depletion phenomenon by the national research. Additionally, it plays a major role in malignant melanoma development. 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.
There, it will absorb almost all ultraviolet light which is harmful to many organisms. One of the main reasons for the widespread concern about depletion of the ozone. But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons cfcs. Environmental effects of ozone depletion and its interactions with. Effects of weakening of the ozone ozone is a molecule consisting of three oxygen atoms o3 and has the property of being highly toxic because of its radioactivity. Ozone layer depletion, its causes, effects and control measures. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. Conversion project approved by the 41st executive committee in december.
Depletion of the ozone layer has consequences on humans, animals, and plants. Ultraviolet radiation not only affects humans, but wildlife as well. The evaporation of surface water through the stomata of leaves increases, which results in the decreased moisture content of the soil. 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. There is a substantial time lag between the time when ods emissions begin to decline and the point at which the ozone layer begins to recover. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. This ozone depletion causes many effects on the environment which are presented here. Excessive uvb inhibits the growth processes of almost all green plants there is concern that ozone depletion may lead to a loss of plant species and reduce global food su. Here we look at the key causes of the thinning of the ozone above our planet. It is a very aggressive cancer and quickly grows inwards and causes secondary tumours to grow on the internal organs.
The ozone layer thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. The effect of atmospheric ozone depletion on environment. But its presence in the outer reaches of the earths atmosphere is absolutely vital to life. The ozone depletion phenomenon the national academies press. Causes of ozone layer depletion and its effects on human. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Ozone layer depletion increases the amount of uvb that reaches the earths surface. Ozone layer depletion, its causes and its effects scribd. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Unlike pollution which has several causes, there is one specific chemical compound that is. It is found largely in the stratosphere that extends from about 6 km at the poles and 17 km at the equator to about 50 km above the earths surface. Uv b, a higher energy form, causes the most damage to living. Current economic models fail to incorporate the effects of highcarbon growth.
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