Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development. EPA uses the Atmospheric and Health Effects Framework model to estimate the health benefits of stronger ozone layer protection under the Montreal Protocol.
List of the seven continents and the 5 oceans of the world. It is also one of the prime reasons which are leading to global warming. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere.
The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. Thanks to the ozone layer which protects us from these harmful rays. From the s the depletion of the ozone layer started to capture the attention of the scientists, environmentalists, and the world community at large.
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. There has been also a lot of research to find out possible solutions to this problem.
Let us see some of the important causes and effects of ozone layer depletion Causes of ozone layer depletion The main things that lead to destruction of the ozone gas in the ozone layer.
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. But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons CFCs.
This is what which leads to almost 80 percent of the total ozone layer depletion. There are many other substances that lead to ozone layer depletion such as hydro chlorofluorocarbons HCFCs and volatile organic compounds VOCs. Such substances are found in vehicular emissions, by-products of industrial processes, aerosols and refrigerants.
All these ozone depleting substances remain stable in the lower atmospheric region, but as they reach the stratosphere, they get exposed to the ultra violet rays. This leads to their breakdown and releasing of free chlorine atoms which reacts with the ozone gas, thus leading to the depletion of the ozone layer.
Let us see its major impacts on human beings Skin Cancer: Malignant melanoma, basal and squamous cell carcinoma are the most common cancers caused by exposure to UV rays. UV rays are harmful for our eyes too.
Direct exposure to UV rays can lead to Cataract problems, and also Photokeratitis or snow blindness. Damage to Immune system: Increased exposure to UV rays can lead to weakening of the response of immune system and even impairment of the immune system in extreme cases.
This will result in you looking older than what you actually are. It can also lead to photo allergy that result in outbreak of rashes in fair skinned people In humans, exposure to UV rays can also lead to difficulty in breathing, chest pain, and throat irritation and can even lead to hampering of lung function.
UV rays affect other life forms too. It adversely affects the different species of amphibians and is one of the prime reasons for the declining numbers of the amphibian species. It affects them in every stage of their life cycle; from hampering the growth and development in the larvae stage, deformities and decreases immunities in some species and to even retinal damage and blindness in some species.
UV rays also have adverse effect on the marine ecosystem. It adversely affects the planktons which plays a vital role in the food chain and oceanic carbon cycle.Ozone depletion describes two distinct but related phenomena observed since the late s: a steady decline of about 4% per decade in the total volume of ozone in Earth's stratosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone over Earth's polar barnweddingvt.com://barnweddingvt.com · Ozone depletion describes two related events observed since the late s: a steady lowering of about four percent in the total amount of ozone in Earth's atmosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar barnweddingvt.com cycle overview · Observations on ozone layer depletion · Public policybarnweddingvt.com · NASA provides daily images, data, and information from satellite instruments that monitor the ozone layer and the ozone hole, a thinning break in the stratospheric ozone layer.
Designation of amount of such depletion as an "ozone hole" is made when the detected amount of depletion barnweddingvt.com · An environmentalist, Mr Uche Agbanusi, says the continuous depletion of the ozone layer by humans through unchecked destruction of natural resources is barnweddingvt.com · The ozone layer is important because it filters harmful ultraviolet radiation as it travels from the sun to the surface of the Earth.
These ultraviolet rays can harm both plant and animal life. After observation of a depletion of the ozone layer from the addition of chlorofluorocarbons and other man barnweddingvt.com · Ozone /ˈoʊzoʊn/, or trioxygen, is an inorganic molecule with the chemical formula O 3.
It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope O 2, breaking down in the lower atmosphere to O 2 or dioxygen. Ozone is formed from dioxygen by the action of barnweddingvt.com