Causes and effects of ozone layer depletion that are. This, in turn, will lead to the breakdown of ozone. Ozone layer depletion increases the amount of uvb that reaches the earths surface. These wavelengths cause skin cancer, sunburn and cataracts, which were projected to increase. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. Chlorofluorocarbons or the cfc are the main cause of ozone layer depletion. The net effect of these link ages is an intensification of both climate change and ozone depletion and possibly a delay in the recovery of the ozone layer. Ozone depletion facts and information national geographic. This depletion makes humans more vulnerable to the uvb rays which are known to cause skin cancer as well as other genetic deformities. Experts blame ozonelayer depletion on manmade chem icals containing. Ozone depletion is primarily caused by human activities. The ozone depletion resulted in secondary production of an ozone layer near the ground terrestrial ozone layer, which is responsible for adverse effects on plants, humans and environment with.
The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Ozone depletion is largely a result of manmade substances. With depletion in ozone s layer, we humans are more prone to uv rays that reaches. Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment. The antarctic ozone hole, as it came to be known, made depletion of.
Effects of ozone layer depletion let us see a few possible effects of the ozone layer depletion on the earths environment and also on the plants and animals. Depletion of the ozone layer results in increased uv radiation reaching the earths surface, which in turn leads to a greater chance of overexposure to uv radiation and the related health effects of skin cancer, cataracts, and immune suppression. What emissions from human activities lead to ozone. This layer serves as a shield that protects the earth from harmful ultraviolet radiation from the sun. These are released by soaps, solvents, spray aerosols, refrigerators, airconditioners, etc. What effect have human activities had on the ozone layer. One of the main effects of the depletion of the ozone layer is an increased level of uv radiation which has many severe effects on humans as well as on other lifeforms. It is an essential factor for many global, biological and environmental phenomena. Reduced ozone levels as a result of ozone depletionozone depletion a chemical destruction of the stratospheric ozone layer beyond natural reactions. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation. The causes, mechanism and bio effects of ozone layer. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. The severe depletion of the ozone layer in any particular area is called ozone hole. The first report of depletion in o 3 layer came out in the 1980s by an atmospheric scientist in antarctica.
Stratospheric ozone depletion, ultraviolet radiation and health. The chlorofluorocarbon and the halons are potent ozone depletors. The causes, mechanism and bio effects of ozone layer depletion on humans were addressed. This radiation could have seriously damaging effects on germinating crops and on the photoplankton of the oceans. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Learn about ozone depletion, its causes, and effects. Ozone layer importance, depletion, effects and protection. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Ozone depletion and the ozone hole have generated worldwide concern over increased cancer risks and other negative effects.
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. Human produced chemicals contain chlorine, fluorine, and carbon often referred to as cfcs. Human activities cause release of cfc gases which are pollutants are responsible for the depletion of ozone layer. The effect humans have on the ozone layer scientific studies over the past 20 years have confirmed human produced chemicals have led to the depletion of the ozone layer. The ozone layer helps to protect life from harmful ultraviolet radiation. Learn more about the process, causes, and effects of ozone layer depletion. Pdf causes of ozone layer depletion and its effects on. Timeline of stratospheric ozone depletion and observations. Frequently asked questions about the ozone layer ozone.
One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in the amounts of ultraviolet radiation received at the surface of the earth and the effect. Ozone layer importance, depletion, effects and protection of ozone layer may 23, 2019 author chemistry, geology and astronomy 0 ozone is a paleblue gas that forms a layer in the stratosphere of our atmosphere called ozone layer. 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, its causes and its effects ozone. This stress could have profound effects on the food chain and on food productivity. Ozone layer depletion cause, effects, and solutions. What are the causes and effects of ozone depletion. What emissions from human activities lead to ozone depletion. The molecules of chlorofluorocarbons in the stratosphere are broken down by the ultraviolet radiations and release chlorine atoms. Ozone layer depletion causes increased uv radiation levels at the earths surface, which is damaging to human health. The ozone layer prevents most harmful uv wavelengths of ultraviolet light uv light from passing through the earths atmosphere. Additionally, since most ozonedepleting substances are also potent.
Stratospheric ozone is constantly being created and destroyed through natural cycles. There are many situations where human activities have. The connection between ozone layer depletion and uvb radiation. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in the amounts of ultraviolet radiation received at the surface of the earth and the effect of this on human health and on the environment. The ozone depleting effect of refrigerants is important, because the ozone layer filters out ultraviolet uv radiation, which might otherwise reach the surface of the earth.
The depletion of ozone layer allows entering of uv rays from sun into the earths atmosphere which is associated with a number of health related and environmental issues. The thinning or reduction of ozone depletion is most prominent in the polar regions, especially over antarctica. Ozone layer protection european commission european union. Life on earth has been protected for thousands of years with a vital layer of poison in the atmosphere. Ozone layer depletion causes, effects and solutions 7. Ozone depletion and climate change environment canada. Questions and answers about the environmental effects of. The ozone hole, discovered in 1985, has been forming every spring in the atmosphere high over antarctica. Project report on ozone depletion environmental pollution. We often think of ozone layer depletion as a modern problem, but. Scribd is the worlds largest social reading and publishing site.
The ozone layer was doomed until a handful of scientists stood up. These gases bring chlorine and bromine to the stratosphere, which cause depletion of the ozone layer. Questions and answers about the environmental effects of the ozone layer depletion and 4 climate change. 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. This is a phenomenon characterized by warming of the earths atmosphere resulting from absorption of. Causes of ozone layer depletion and its effects on human.
The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. The thinning is most pronounced in the polar regions, especially over antarctica. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. Hence, cfcs are transporting agents that are responsible for damaging the ozone layer. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders. Ozone layer depletion leads to thinning of the ozone layer thereby exposing the organisms on earth to harmful ultraviolet radiation and increase in global temperature with adverse effects on man, leading to skin cancer, eye disorders, immunological effects, aquatic life and land vegetation joe buchdahl, 2002. Questions and answers about the environmental effects of the. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. Health and environmental effects of ozone layer depletion. The depletion of the ozone describes two closely related but distinct phenomena which have been repeatedly observed since the latter 1970s. Learn about the health and environmental effects of ozone layer depletion.
Certain industrial processes and consumer products result in the emission of halogen source gases to the atmosphere. It contains high concentration of ozone o 3 in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. This study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. Ozone layer depletion the emission of ods account for roughly 90% of total depletion of ozone layer in stratosphere. There are two more important hazards which are posing challenges to future existence of our civilization are green house effect and ozone depletion. Since the ozone layer usually blocks the radiation, a depletion of the ozone layer increases the level of ultraviolet radiation. What effects does the depletion of ozone have on environmental processes and.
In 1985, the scientists published an article in nature announcing that stratospheric ozone over antarctica was reduced 40% in september, the end of the austral winter. As the eruption of mount pinatubo proved in 1991, natural eruptions can have a dramatic negative effect on the manmade ozone layer depletion chemicals that are in the atmosphere. 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. Ozone o3 is produced in the stratosphere by the intense solar radiation causing photodissociation of. Climate change and stratospheric ozone depletion early effects on. Humans have introduced gases and chemicals into the atmosphere that have rapidly depleted the ozone layer in the last century. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Even the proponents of humaninduced ozone depletion are starting to realize that the thinning of the ozone layer is a natural phenomenon that just waxes and wanes. Causes, effects and solutions of ozone layer depletion.
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