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[Audio] Education on ozone Do you know about the Ozone and it's affect Ozone depleting substances are man-made gases that destroy ozone once they reach the ozone layer. The ozone layer sits in the upper atmosphere and reduces the amount of harmful ultra violet radiation that reaches Earth from the sun. Ultraviolet radiation can have detrimental effects on both humans and the environment. For instance inducing skin cancer and cataracts, distorting plant growth and damaging the marine environment. Ozone depleting substances include: Chlorofluorocarbons ( HCFCs) Hydro chlorofluorocarbons ( HCFCs) Hydro bromoflurocarbons ( HBFCs) Halons Methyl bromide tetrachloride Methyl chloroform They have been used us:.

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[Audio] Do you know about the Ozone and it's affect Ozone depleting substances are man-made gases that destroy ozone once they reach the ozone layer. The ozone layer sits in the upper atmosphere and reduces the amount of harmful ultra violet radiation that reaches Earth from the sun. Ultraviolet radiation can have detrimental effects on both humans and the environment. For instance inducing skin cancer and cataracts, distorting plant growth and damaging the marine environment. Ozone depleting substances include: Chlorofluorocarbons ( HCFCs) Hydro chlorofluorocarbons ( HCFCs) Hydro bromoflurocarbons ( HBFCs) Halons Methyl bromide tetrachloride Methyl chloroform They have been used us:.

[Audio] Do you know about The reactive halogen gases that destroy stratospheric ozone Let us understand the halogen source gases and Reactive halogen gases In halogen source gases, there are many gases like CFC 12, CFC 11, CFC 113, HCFCs, Methyl bromide. These all chemicals get converted into Reactive halogen gases like Hydrogen Bromide, Bromine nitrate, Hydrogen chloride, etc and most reactive gases like CLO, BRO, BR CL Stratospheric Halogen Gases.

[Audio] Maximum contribution is Plastic which is 32%, then solvents about 21%, then auto air conditioning is 20% and other refrigerant is 17% and list is aerosol is 3[break]%.

[Audio] This is the list of ODS. Ozon depleting substances and lifetime and % of chlorine contribution. CFC 11, CFC 12, CFC 113, Halon 1211, Halon 1301 and HFC 134a.

[Audio] Origin of world Ozone Day The Montreal Protocol, finalized in 1987, isa global agreement to protect the stratospheric ozone layer by phasing out the production and consumption of ozone-depleting substances ( ODS). The Montreal protocol is a model of cooperation. It is a product of the recognition and international consensus that ozone depletion is a global problem, both in terms of its causes and its effects. The protocol is the result of an extraordinary process of scientific study, negotiations among representatives of the business and environmental communities, and international diplomacy. It is a monumental achievement..

[Audio] The ozone layer protects the Earth against most UVB coming from the sun. This has protected millions of people from skin cancer and cataracts over the years since. It allowed vital ecosystems to survive and thrive. It safeguarded life on Earth. And it slowed climate change: if ozone-depleting chemicals had not been banned, we would be looking at a global temperature rise of an additional 2.5°C by the end of this century. This would have been a catastrophe..

[Audio] Simple Way to understand Ozone Depletion. You can see in the picture sun rans can not penetrate the ozone layer. The sun ray can penetrate at the week ozone layer section from where harmful UV rays are entering on earth which is harmful to human being. CFCs, HCFCs, VOCs are the ODS which is damaging the ozone layer.

[Audio] Simple Way to understand Ozone Depletion We can understand from the picture beginning from 1971, 2015, 201 and 2065 overview where do we stand with respect to ozone depletion.

[Audio] Simple Way to understand Ozone Depletion Twenty question and answer about the ozone layer 2014 update.

[Audio] Q1: What is ozone and where is it in the atmosphere? What do you mean by ozone and where is it in the atmosphere?.

[Audio] Ozone is a gas that is naturally present in our atmosphere. Each ozone molecule contains three atoms of oxygen and is denoted chemically as O3. Ozone is found primarily in two regions of the atmosphere. About 10% of atmospheric ozone is in the troposphere, the region closest to Earth (from the surface to about 10- 16 kilometers ( 6- 10 miles)). The remaining ozone ( 90%) resides in the stratosphere, primarily between the top of the troposphere and about 50 kilometers ( 31 miles) altitude. The large amount of ozone in the stratosphere is often referred to as the " ozone layer." Oxygen atom, oxygen molecule O@, Ozone molecule O3 A molecule of ozone O3 contain three oxygen O atoms bud together. Oxygen molecules O2, which constitute 21% of earth's atmosphere, contain two oxygen atoms bound together.

[Audio] What do you mean by "How is ozone formed in the atmosphere?".

[Audio] Ozone is formed throughout the atmosphere in multistep chemical processes that require sunlight. In the stratosphere, the process begins with an oxygen molecule ( O2 ) being broken apart by ultraviolet radiation from the Sun. In the lower atmosphere ( troposphere), ozone is formed in a different set of chemical reactions involving hydrocarbons and nitrogen-containing gases..

[Audio] Why do we care about atmospheric ozone?. Q3: Why do we care about atmospheric ozone?.

[Audio] Ozone in the stratosphere absorbs some of the Sun's biologically harmful ultraviolet radiation. Because of this beneficial role, stratospheric ozone is considered "good" ozone. In contrast, excess ozone at Earth's surface that is formed from pollutants is considered "bad" ozone because it can be harmful to humans, plants, and animals. The ozone that occurs naturally near the surface and in the lower atmosphere is also beneficial because ozone helps remove pollutants from the atmosphere..

[Audio] Is total ozone uniform over the globe?. Q4: Is total ozone uniform over the globe?.

[Audio] No, the total amount of ozone above the surface of Earth varies with location on time scales that range from daily to seasonal and longer. The variations are caused by stratospheric winds and the chemical production and destruction of ozone. Total ozone is generally lowest at the equator and highest near the poles because of the seasonal wind patterns in the stratosphere..

[Audio] How is ozone measured in the atmosphere?.

[Audio] The amount of ozone in the atmosphere is measured by instruments on the ground and carried aloft on balloons, aircraft, and satellites. Some measurements involve drawing air into an instrument that contains a system for detecting ozone. Other measurements are based on ozone's unique absorption of light in the atmosphere. In that case, sunlight or laser light is carefully measured after passing through a portion of the atmosphere containing ozone..