OZONE LAYER
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Transcript of OZONE LAYER
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HOW TO SAVE MOTHER
EARTH?
PRESENTED BY
RINKU BALAN.KMSc. COMPUTER SCIENCEST.JOSEPH’S COLLEGEIRINJALAKUDAKERALA
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Ozone layer• The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's UV radiation.
• It protects humans and other organisms from the UV radiation.
• It absorbs 97-99% of the suns high frequency ultraviolet light which is potentially damaging to the life form on earth.
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Ozone Depletion
Scientific evidence indicates that stratospheric ozone is being destroyed by a group of manufactured chemicals, containing chlorine and/or bromine. These chemicals are called "ozone-depleting substances" (ODS).
The main ODS are:• chlorofluorocarbons (CFCs)• hydrochlorofluorcarbons (HCFCs)• carbon tetrachloride • methyl chloroform• Halons (brominated fluorocarbons)
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The Impacts of Ozone Depletion
Harm to human health.
• skin cancers, sunburns, cataracts, blindness.
Adverse impacts on agriculture, forestry and natural ecosystems.
• major crop species are resulting in reduced growth, photosynthesis and flowering.
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Damage to marine life.
• plankton are threatened by increased UV radiation, reduce fish yields.
Animals
• In domestic animals, UV overexposure may cause eye and skin cancers.
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HOW TO PROTECT THE OZONE LAYER ?
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• Minimize high altitude aircraft flights (oxygen reduction and water vapor deposition)
• Minimize rocket flights (water vapor deposition)
• Encourage growth of plants that produce oxygen, discourage deforestation
• Decrease / control releases of high temperature steam / moisture to the atmosphere
• Eliminate production and release of known ozone depleting chemicals (such as CFCs and HCFCs) where remotely possible. Subsidize production of safer alternatives where possible.
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• Try to use products which are labeled "Ozone-Friendly“.
• Ensure technicians repairing your refrigerator or air conditioner recover and recycle the old CFCs so they are not released into the atmosphere.
• Vehicle air conditioning units should regularly be checked for leaks.• Help start a refrigerant recovery and recycling program in your area if none already exists.
• Replace halon fire extinguishers with alternatives(e.g. carbon dioxide or foam).
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THANK YOU