DEFINATION:Ozone is a naturally occurringmolecule containing three molecules of oxygen. At ground level, ozone is healthhazard and a major constituent of smog. In the stratosphere, ozone protects lifeon earth by absorbing ultraviolet (UV) radiation from the sun. the release of chlorofluorocarbons(CFC) and other ozone-depleting substances, which were used widely asrefrigerants, insulting foams and solvents.The wearing out orreduction of the amount of ozone in the stratosphere is called ozone layerdepletion.
One major human activity cause ozone depletion. Industries thatmanufacture things like soaps, solvents, insulating foams, cooling things like ‘Take-Away’containers, Refrigerators and Air Conditioners, use something calledchlorofluorocarbons (CFCs). These substances are heavier than air this substancesare carried high into the stratosphere by wind action, over time about two-fiveyears.Ozone layer depletion hasconsequences on plants, animals and humans. This is because of the high UVlevels reaching us on earth.
HOW OZONE DEPLETION OCCUR:Ozone depletion is causedby the release of chlorofluorocarbons (CFCs) and other ozone-depletingsubstances (ODS). This substances are the substance that are used widely assolvent, insulting foams and refrigerants. CFCs are heavier than air. CFCs are carriedinto the stratosphere in a process that can take as long as 2 to 5 years. Byusing satellites, aircraft and balloons, measurements of CFCs in thestratosphere are made.The ultraviolet radiationfrom the sun causes CFCs to release chlorine atoms which react with ozone andbreak apart.
This happens when CFCs reach the stratosphere. This will cause itto start chemical cycles of ozone destruction that will deplete the ozonelayer. One chlorine atom can destroy more than hundred thousand ozonemolecules.
Methyl chloroform thatare used as a solvent in industrial processes for essential applications, halonsthat are used in fire extinguishers, and methyl bromide that are used as apesticide are example of other chemicals that damage the ozone layer. Whenhalons and methyl bromide are broken apart, they release bromine atoms. Comparedto chlorine atoms, halons and methyl bromide are forty times more destructiveto ozone molecules.