The effects of ozone depletion on the environment this layer of ozone that covers our planet like a blanket is slowly thinning due to the greenhouse gas emissions in the atmosphere. Ground ozone concentration is lower in polar and equatorial regions. Uv radiations are very harmful and can cause health issues such as skin cancer, ageing. Project report on ozone depletion environmental pollution. The ozone layer is mainly found in the lower portion of the stratosphere, about 20 to 30 km 12 to 19 miles above the earth, though the thickness varies seasonally and geographically. Pdf environmental effects of ozone depletion and its.
Environmental effects of air pollution and application of engineered methods to combat the problem ahmad ashfaq 1 and pratiksha sharma 2. The assessments shall be made at least every four years. The main effects of the ozone holeinduced positive phase of the sam on the southern ocean are shown in c. Environmental studies ozone depletion ozone is a form of oxygen in which three atoms of oxygen combine to form a single molecule of ozone. Progress report 2003 united nations environment programme, environmental e.
Causes of ozone layer depletion and its effects on human. At ground level, ozone is a pollutant that can harm human health. Environmental effects of ozone depletion, uv radiation and. 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. Health and environmental effects of ozone layer depletion. However, formatting rules can vary widely between applications and fields of interest or study.
Causes, effects and solutions of ozone layer depletion. The environmental impacts depend critically on the geographical extent and seasonality of the ozone depletion. The environmental effects assessment panel eeap is one of three panels of experts that inform the parties to the montreal protocol. O 3 depletion leads to the entry of more uv radiation into the troposphere. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Environmental effects of ozone depletion and its interactions.
Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Health and environmental effects mnn mother nature. 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. With depletion in ozones layer, we humans are more prone to uv rays that reaches. Ozone depletion facts and information national geographic. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Over the past century, increasing greenhouse gases and depletion of ozone have pushed the sam towards its more positive phase black arrow in b. Introduction the ozone layer is a layer in earths atmosphere which. Ozone layer depletion increases the amount of uvb that reaches the earths surface.
Cl2g 2clg in presence of light effects of ozone depletion. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. Health and environmental effects of ultraviolet radiation. Pdf there are many situations where human activities have significant effects on the environment. Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment. Questions and answers about the environmental effects of the ozone layer depletion and 4 climate change. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. Health and environmental effects of ozone layer depletion epa.
Health and environmental effects groundlevel or bad ozone is not emitted directly into the air, but is created by chemical reactions between oxides of nitrogen nox and volatile organic com. Understanding the role of temperature, together with uvb irradiation, is scientifically and economically important. The eeap focuses on the effects of uv radiation on human health, terrestrial and aquatic ecosystems, air quality, and materials, as well as on the interactive effects of uv radiation and global climate change. The ozone layer in the stratosphere occurs naturally, and it encircles the planet. Ozone depletion is allowing the uv radiation to earth surface. Update, 2017 united nations environment programme, environmental effects assessment panel the environmental effects assessment panel eeap is one of three panels of experts that inform the parties to the montreal protocol. It will magnify the effects of ultraviolet rays on human health. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too.
In the southern hemisphere, shifts in the latitudinal position of. Environmental effects of ozone depletion ceda document repository. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. Environmental studies ozone depletion tutorialspoint. Download fulltext pdf download fulltext pdf download fulltext pdf. Dirty rockets whats the environmental impact of going into space. Feb 15, 2017 ozone depletion in antarctica was shown to explain more than half of the observed longterm changes in austral subtropical precipitation between 1979 and 20, while increasing ghgs have a weaker role.
Energy production and use effects of fossil fuel production effects of fossil fuel combustion acid rain cfc emissions from hvac equipment stratospheric ozone depletion global warmingthe greenhouse effect energy conservation as a pollution and greenhouse gas reduction strategy. The present assessment deals with the results of such investigations. The ozone layer helps to protect life from harmful ultraviolet radiation. Also, recent studies of the effects of uv radiation on materials such as synthetic polymers and biopolymers are covered in the report. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Pursuant to article 6 of the montreal protocol on substances that deplete the ozone layer under the auspices of the united nations environment programme unep nairobi, kenya, october 1996. Climate change and the effects of ozone depletion on atmospheric circulation are expected to have regionally variable effects on the depth of ocean mixing 203 and ocean circulation see section 1. The main adverse health effects of higher exposure to uvb radiation, which is, in part, a consequence of depletion of stratospheric ozone, are increased risks of skin cancers, immune suppression, and disorders of the eye, including cataract. The second focus is on interactions between uv radiation and global climate change and how these may affect humans and the environment. Jan 28, 2018 environmental effects of ozone depletion, uv radiation and interactions with climate change. In the stratosphere, however, ozone forms a layer that protects life on earth from the suns harmful ultraviolet uv rays. Other linkages between climate change and ozone depletion are related to the effect of increased levels of ultraviolet radiation on sundriven.
Oct 27, 2017 the effects of ozone depletion on plants and animals. Scientific studies are continuing on the most important effects, and on what can be done to prevent or mitigate these. Effects of stratospheric ozone depletion, and the subsequent increased uvb radiation, on the useful lifetimes of plastics will be more severe in locations that experience high ambient temperatures. Pdf causes of ozone layer depletion and its effects on. Pdf environmental effects of ozone depletion and its interactions. Depletion of the ozone layer and its impacts canada. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. The above reaction leads to the formation of chlorine and begins a chain reaction thereby causing ozone depletion. Questions and answers about the environmental effects of the. Ozone depletion results in greater amounts of uvb radiation that had an impact on terrestrial and aquatic biogeochemical systems. Reducing the use of ozone depletion substances ods. An increase in the levels of uvb reaching the earth as a result of ozone depletion may compound the effects that sun worshipping habits have already created. The exposure to these radiations is severely affecting all life forms on earth. Biogeochemical cycles were the complex interactions of physical, chemical, geological and biological processes that.
The united nations environment programme assessment panel on the environmental effects of ozone depletion produced this report. It breaks down and reacts with ozone molecules in accordance with the equation above repeatedly until a more stable compound is created. It is this issue that underscores the current need to better understand the potential health and. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozone depleting substances, and sun safety. Environmental effects and interactions of stratospheric ozone depletion, uv radiation, and climate change. Causes of depletion, status and recovery of the ozone layer. Massive amounts of uvb radiation that penetrate our atmosphere do not only affect humans, but also animals and plants. In recent years these effects have become more prevalent because canadians are spending more time in the sun and are exposing more of their skin in the process.
Environmental effects of ozone depletion and its interactions with climate change. Refrigerants containing chlorine or bromine contribute to the breakdown of the ozone layer see figure 5. The causes, mechanism and bio effects of ozone layer depletion on humans were addressed. There are many situations where human activities have. The ozone layer protects living things from harmful ultraviolet rays from the sun.
Ozone is a gas that occurs both at groundlevel and in the earths upper atmosphere, known as the stratosphere. No new negative environmental effects of the substitutes for ozone depleting substances or their breakdownproducts have been identified however, some substitutes for ozone depleting substances will continue to contribute to global climate change if concentrations rise above current levels. The montreal protocol on substances that deplete the ozone layer requires periodic. It is an essential factor for many global, biological and environmental phenomena. Index terms bio effects, chlorofluorocarbon, ozone layer depletion, protection. Ozone depletion and climate change environment canada.
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