Ozone layer depletion quiz hvac certification practice tests. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. 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. Ozone layer depletion causes increased uv radiation levels at the earths surface, which is damaging to human health. Ozone layer is a protective stratospheric layer, also known as ozone umbrella. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2.
Addressing ozone layer depletion ozone layer protection. In the past decade, we have come across constant news about depletion of the ozone layer. Mar 12, 2019 ozone layer depletion is the destruction of ozone gas of upper atmospheric layer stratosphere, caused by substances formed from breakdown of ozone depleting substances ods. Avoiding and reducing ozone how ozone pollution works. They also observed an ozone hole developing above the antarctic. It was signed in 2016 to reduce ozone layer depletion. Ozone absorbs a band of ultraviolet radiation called uvb. These solutions to ozone depletion can help to reinforce this shield so that it stays in place for future generations. Ozone layer depletion cause, effects, and solutions biology.
This means if we can do something to balance the natural production with its depletion, there should not be a problem. Nations have been working to reduce ozonedepleting chemicals since the 1980s, but recent studies show that there is still work. Lets have a look at some of the solutions to ozone layer depletion. There has been also a lot of research to find out possible solutions to this problem.
Researchers found evidence that linked the depletion of the ozone layer to the presence of chlorofluorocarbons cfcs and other halogensource gases in the stratosphere. Ozone layer depletion causes, effects and solutions. But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons cfcs. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. This in turn also damages the ozone layer causing it to deteriorate. Apr 20, 2018 earths ozone layer shields us from harmful ultraviolet radiation. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Ozone layer and causes, effects and solutions to ozone. 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. But many researchers do not agree with these predictions,14 and express their. Instead of looking back at the successful cfc phaseout, the u. The ozone layer over southern canada has thinned by an average of about 7% since the 1980s. The ehso web site provides the latest information, explanations, resources and links free about ozone depletion and many more environmental topics that affect the health of you and your family.
May 12, 2018 what is important to keep in mind is the fact that prevention of ozone layer depletion is so very important because it directly affects the well being of the people. The main things that lead to destruction of the ozone gas in the ozone layer. Ozone layer protection environmental protection department. Case study on ozone layer ozone depletion chlorofluorocarbon. With the discovery of the ozone hole over antarctica in the mid 1980s, the world was. 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. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. There are many situations where human activities have. Solutions to ozone layer depletion the depletion of ozone layer is a serious issue and various programmes had been launched by the government of various countries to prevent it. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival.
This legally binding international treaty called for participating developed nations to reduce the use of cfcs and other ozone depleting substances. Luckily, cfc emissions have decreased, but we need to continue so that there will be no more cfcs. In 1987, to address the destruction of the ozone layer, the international community established the montreal protocol on ozone depleting substances. The layers which occupy the lower part of the atmosphere removes the unwanted pollutants from the earths surface. Awareness has to increase if we can ever have the idea that we are going to control the depletion. Ozone concentration differs by about 10 ppm in stratosphere compared to 0.
Protecting the ozone layer department of the environment. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. Ozone layer depletion causes, effects and solutions 7. Protocols objective is to cut down the production and consumption of ozonedepleting substances, in order to reduce their presence in the atmosphere and thus protect the earths ozone layer.
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. Ozone is ozone is a form of oxygen with 3 oxygen atoms o3. The main purpose in our website is to inform students and adults about the ozone layer and ozone depletion. In response to this and additional fears about more widespread global ozone depletion, the montreal protocol on substances that deplete the ozone layer was implemented in 1987. This causes more ozone to be destroyed than created causing a hole in the ozone that allows the suns harmful ultraviolet rays to. Ozone layer, ozone hole, ozone depletion, recovery causes, effects, and solutions of ozone depletion which is asked in upsc, state pcs, and other government exams. The chlorofluorocarbon and the halons are potent ozone depletors. Ozone layer damage is more like a really thin patch than a hole.
This can reduce the emission of nitrogen oxides nox which contribute in ozone layer depletion. These ozone molecules form a gaseous layer in the earths upper atmosphere called stratosphere. Find out what caused the ozone hole, and how the 1989 montreal. With more uv radiation reaching the earth surface due to ozone depletion, human. Ozone depletioncauses, effects, solutions by tim wise on prezi. Ozone layer depletion is one of the most serious problems faced by our planet earth. The latter phenomenon is referred to as the ozone hole.
The upper layer of the atmosphere surrounded by ozone 15 to 30 kms is known as ozonosphere. This is because vehicular emissions eventually result in the release of smog. 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. When it is in our atmosphere, however, it helps to shield us from the dangerous radiation that the suns rays produce. In fact whole world is vulnerable to its after affects. The montreal protocol on the protection of the global ozone layer is a somewhat. Ozone depletion is the effect of the cfcs on the ozone layer. Let us see some of the important causes and effects of ozone layer depletion. The initial step in the depletion of stratospheric ozone by human activities is the emission of ozonedepleting gases containing chlorine and bromine at earths surface. Ozone layer protection european commission european union. What are the principal steps in stratospheric ozone depletion caused by human activities. The assessment may be reproduced or excerpted, without.
Uncovering the hidden hazard of hairspray a usual morning routine might include a spritz of hairspray, a spurt of shaving cream, or a spray of deodorant. One of the easiest ways to reduce damages caused to the ozone layer is by limiting the use of vehicles. Both are essential for life but air also protects all of us and it is therefore understandable that the response to the depletion of the ozone layer became international. We do these things almost automatically, not really even thinking about it. Carlos juarez, andrew berry, panchalee perera, lisa khairy what is ozone depletion. 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. Ozone layer depletion cause, effects, and solutions. This lower region of stratosphere containing relatively higher. Twenty questions and answers about the ozone layer. Protecting the ozone layer while also preventing climate.
Pdf causes of ozone layer depletion and its effects on. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. Scribd is the worlds largest social reading and publishing site. 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. Causes, effects and solutions of ozone layer depletion. That makes it important for each and every one of us to take actions to reduce ozone layer.
The thinning is most pronounced in the polar regions, especially over antarctica. Some of the most dangerous gases are cfcs chlorofluorocarbons, halogenated hydrocarbon, methyl bromide and nitrous oxide. The ozone layer helps to protect life from harmful ultraviolet radiation. Nations have been working to reduce ozonedepleting chemicals since the. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95.
But, steps should be taken at the individual level as well to prevent the depletion of ozone layer. Ozone holes are popular names for areas of damage to the ozone layer. The depletion of the ozone layer 1593 words 7 pages. Alternatives to cfcs the use of propane and 2methyl propane as refrigerant coolants although their use would reduce ozone. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. It acts as a protective shield for the man, animals and. It appears unlikely that the decrease in ozonedepleting substances alone will lead to the recovery of the stratospheric ozone layer to its pre1980. Demonstrating lowgwp alternatives to hcfcs by finding costeffective solutions. Causes of ozone layer depletion and its effects on human. Les diablerets, switzerland by jeanpierre pommereau, june 2010. Protecting the ozone layer and reducing global warming undp.
It was the first international treaty to be signed by all countries of the world and is considered the greatest environmental success story in the history of the united nations. The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. Case study depletion of ozone in the atmosphere the work of g. The severe depletion of the ozone layer in any particular area is called ozone hole. Ozone is a colorless gas that can be a lung irritant when it is present at groundlevel. Protecting the ozone layer while also preventing climate change pdf. Ozone depletion consists of two related events observed since the late 1970s. 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. Timeline of stratospheric ozone depletion and observations. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in.
Case study on ozone layer free download as powerpoint presentation. People ask if we cannot produce our own ozone gas to replenish what is lost in the stratosphere. Avoid the consumption of gases dangerous to the ozone layer, due to their content or manufacturing process. Feb 25, 2016 efforts need to be continued create reliable models to gain a better understanding of the effects ozone depletion has on organisms living within different ecosystems enforcement of montreal protocol to reduce concentrations of chemicals responsible for ozone depletion monitoring chemicals being emitted gain a better overall understanding on. Aerosols are common, convenient, and harmless, right. At midlatitudes in the northern hemisphere, up to 3% decrease in ozone. 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. It is also one of the prime reasons which are leading to global warming.
In the 1970s, people all over the world started realizing that the ozone layer was getting thinner and that this was a bad thing. Ozone depletion and climate change environment canada. Depletion of o3 can increase uv radiation entering earth surface. Does depletion of the ozone layer increase groundlevel ultraviolet radiation. Generally, we find thinning or depletion of the ozone layer to the extent of ozone hole creation over the southern pole i. Ozone layer depletion is the destruction of ozone gas of upper atmospheric layer stratosphere, caused by substances formed from breakdown of. The ozone layer resides in the stratospheric layer of the earths atmosphere.
The mere thought that there exists a layer that is strong enough to slash through the sun and destroy life on earth is enough to send chills down the spine. 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. What is being done to protect us from the depletion of the ozone layer. As individuals, we should follow the recycle, reuse, reduce, initiative to help control climate change which has a key part for the layer to recover. 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.
The best transport option is urban, bicycle, or walking. Ozonedepleting substances ods are synthetic chemicals, which were used around the world in a wide. Earths ozone layer shields us from harmful ultraviolet radiation. Ozone is a natural gas and is naturally replenished over time. Ozone depletion facts and information national geographic. Ozone depletioncauses, effects, solutions by tim wise on. What we all need to understand is the idea that we all are going to. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation.
But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. If you are looking for ways on how to prevent ozone depletion, then you do have certain. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozonedepleting substances, and sun safety. What we all need to understand is the idea that we all are going to have to face the repercussions of ozone layer depletion. Protecting the ozone layer cfc substitutes legislations like montreal protocol. Ozone layer and causes, effects and solutions to ozone depletion. Ozone depletion in canada is usually greatest in the late winter and early spring. Besides personal attempts to reduce ozone pollution, the epa has initiated more stringent airquality standards such as the clean air act and its modifications to reduce air pollution. This website provides key information on how ozone depletion started, what is being done to prevent damage to our ozone and what effects will occur if depletion continues. The thinning or reduction of ozone depletion is most prominent in the polar regions, especially over antarctica. 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. In the late 1990s, average ozone depletion in the summer over canada was between 3% and 7%. What is your conclusion about ozone layer depletion answers.
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