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