Learn about ozone depletion, its causes, and effects. Ozone is a form of oxygen that is present in the earths atmosphere in small quantity. Ozone layer the ozone layer or ozone shield refers to a region of earths stratosphere that absorbs most of the suns ultraviolet uv radiation. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. International journal of environmental science and development, vol. Ozone layer depletion, its causes, effects and control measures. Ozone layer depletion pdf file the origin, causes, mechanisms and bio effects of ozone layer depletion as.
Ozone layer depletion, its causes and its effects free download as powerpoint presentation. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epa. The ozone layer is mainly found in the lower portion of the stratosphere. There are also springtime polar tropospheric ozone depletion.
These wavelengths cause skin cancer, sunburn and cataracts, which were projected to increase. 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. The latter phenomenon is referred to as the ozone hole. Protecting the ozone layer department of the environment. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Ozone depletion facts and information national geographic. Man has tried hard to deploy protective measures towards controlling the ozone layer from depletion,but this is so. Scribd is the worlds largest social reading and publishing site.
It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. Since 2000 rate of ozone depletion is increasing 0. Environmental effect of ozone depletion 1998 assessment unep, 1998. The chlorofluorocarbon and the halons are potent ozone depletors. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Pdf causes of ozone layer depletion and its effects on human. What is an ozone hole and causes and effects of ozone. Jan 20, 2010 causes of ozone depletion there are two different types of ozone depletion, both are very similar. What are the causes and effects of ozone depletion. Health and environmental effects of ozone layer depletion. Global warming and the depletion of the ozone o3 layer. Ozone layer depletion increases the amount of uvb that reaches the earths surface.
What is an ozone hole and causes and effects of ozone depletion. The proteins cells in plants undergo harmful mutations, all due to ultraviolet radiations. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. The ozone layer protects us from excessive levels of harmful ultraviolet uv radiation. The ozone layer thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. It is revealed that introduction of chlorof lourocarbons cfcs in the environment is the most rated cause of said depiction. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. Causes of ozone depletion ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction. There have been several concerns about ozone depletion. The latest ozone layer depletion news is included at the foot of the page. It contains high concentrations of ozone o3 relative to other parts of the atmosphere, although still.
Causes and effects of ozone layer depletion that are. The ozone layer prevents most harmful uv wavelengths of ultraviolet light uv light from passing through the earths atmosphere. How ozone layer is depleting factors contributing its destruction. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Causes of ozone depletion the fact that the ozone layer was being depleted was discovered in the mid1. Ozone protects life on earth by stopping uv ultraviolet rays of sun in the upper atmosphere, it does not allow them to reach at the ground level. However, various factors have led to the depletion and damage of this protective layer. The ozone layer protects the surface of the earth and its phenomena from stray rays from the sun. Project report on ozone depletion environmental pollution.
There had been a lot of research on this topic over these years to find out all the possible causes. With depletion in ozones layer, we humans are more prone to uv rays that reaches the earths surface. Dec 14, 2015 what are the effects of ozone depletion. The thinning is most pronounced in the polar regions, especially over antarctica. Ozone depletion biology science fair project ideas. 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 layer depletion cause, effects, and solutions. There are many situations where human activities have.
The main effect of ozone depletion is an increase in uvb raysreaching the earths surface. Ozone layer depletion, its causes and its effects ozone. It is an essential factor for many global, biological and environmental phenomena. 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 allows only the required doses of the suns solar energy to reach the earths surface. 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.
This study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. 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. Causes of ozone layer depletion and its effects on human. They will do surveys, awareness campaigns making pamphlets and distributing, collection of data and its analysis. Cfcs and halons break down into chlorine and bromine which in turn destroy the ozone layer. Ozone depletion and the ozone hole have generated worldwide concern over increased cancer risks and other negative effects. The stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from.
Ozone gas is perceptibly blue in colour and has a characteristic pungent smell. Ozone layer depletion causes and effects of ozone layer. Ozone depletion ozone depletion chlorofluorocarbon. Cause and effects of ozone depletion research paper.
This paper analyses the causes and effects of ozone depletion. Ozone depletion is allowing the uv radiation to earth surface. Pdf causes of ozone layer depletion and its effects on. Learn more about the process, causes, and effects of ozone layer depletion. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere.
Ozone layer depletion causes, effects and solutions 7. Ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is disturbed. 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 is a molecule consisting of three oxygen atoms o3 and has the property of being highly toxic because of its radioactivity. Its presence in the lower atmosphere closer to earth contributes to air pollution and causes damage to human tissues. 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. Dec 06, 2015 ozone layer the ozone layer or ozone shield refers to a region of earths stratosphere that absorbs most of the suns ultraviolet uv radiation. One of the main reasons for the widespread concern about. About depletion of the ozone layer is the anticipated increase in the amounts of.
Ozone depletion ozone depletion chlorofluorocarbon free. Ozone layer depletion, its causes, effects and control. Let us see some of the important causes and effects of ozone layer depletion. Causes of ozone depletion there are two different types of ozone depletion, both are very similar. Rivm report 481505011 technical report on stratospheric ozone. Ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. Causes of ozone depletion the fact that the ozone layer was being depleted was discovered in the mid1980s. Mar 28, 2020 ozone depletion and uv radiations ozone depletion results in an increase of uvb radiation, but the shorter the wavelength, the stronger the increase within the uvb range. 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. 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. Global warming and the depletion of the ozone o3 layer the average surface temperature on earth has increased approximately 1. Our powerpoint presentation about ozone depletion, its effects and its causes.
Ozone in the lower atmosphere contributes to global warming and climate change. Ozone depletion is primarily caused by human activities. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. The first one has been a slow, but steady ozone depletion of 4% per decade of the earths. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Students will research on the ozone hole depletion causes and effects. Ozone depletion from the 1970s the depletion of the ozone layer started to capture the attention of the scientists, environmentalists, and the world community at large. Download file to see previous pages the effect of ozone depletion is more than what one would anticipate.
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 uv b can cause biological effects is well demonstrated by the familiar sunburn that follows overexposure to the sun. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. Aug 18, 2017 the ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. 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. Although natural phenomenon can cause ozone depletion but human activities such as cfcs are now accepted as major cause of depletion 9. The depletion of ozone layer has trickle down effects in the form of global warming, which in turn leads to melting of polar ice, which will lead to rising sea levels and climatic changes around the world. The emission of ozone depleting substances has been damaging the ozone layer. Due to depletion of ozone uv rays are penetrating in troposphere and leading to more ozone formation in troposphere which is causing injurious effects on our health as ozone is toxic for our body 8.
Ozone depletion free download as powerpoint presentation. The exposure to these radiations is severely affecting all life forms on earth. Pdf on jan 1, 2001, md safiuddin and others published global ozone depletion. The main things that lead to destruction of the ozone gas in the ozone layer. The problems and causes associated with ozone depletion arise from human activities. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface.
The causes, mechanism and bio effects of ozone layer depletion on humans were addressed. The ozone layer helps to protect life from harmful ultraviolet radiation. We refer to these reports for detailed information. Progress report 2003 united nations environment programme, environmental e. There had been a lot of research on this topic over these years to find out all the possible causes that lead to this problem and the effects of ozone depletion. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. Ozone layer is a deep layer in earths atmosphere called stratosphere that contain ozone which is a naturally. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. Ozone depletion consists of two related events observed since the late 1970s. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Let us have a detailed look at the various causes and effects of ozone layer depletion. Causes of ozone layer depletion, effects, prevention. May 03, 2017 ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth.