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Manusha

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Manusha

  1. 1. ByBy MANUSHA.PMANUSHA.P
  2. 2. INTRODUCTIONINTRODUCTION 1)1) DefinitionDefinition 2)2) DiscoveryDiscovery 3)3) Types of ozoneTypes of ozone 4)4) Effects on humans and plants.Effects on humans and plants. 5)5) Chemical equationChemical equation 6)6) CausesCauses 7)7) Measures to be takenMeasures to be taken
  3. 3. Ozone, O3 , is  Ozone is formed in stratosphere,which traps uv rays ,cosmic rays which causes to many diseases.  Colorless but highly irritating to life forms  Found in troposphere as well as in stratosphere  10-15 km above the earth and 4 nm in thickness
  4. 4. Sydney chapmanSydney chapman
  5. 5. http://whyfiles.org/030air_pollution/images/nasaozone.gif
  6. 6. Good Ozone v. Bad OzoneGood Ozone v. Bad Ozone Good ozone  located in the stratosphere.  It traps ultraviolet rays  Protects human life Bad ozoneBad ozone  produced in the troposphere  Called surface ozone or ground level (O3)  pollutant
  7. 7. http://harmanonearth.files.wordpress.com/2008/05/ground_ozone.jpg
  8. 8. Optimum Weather ConditionsOptimum Weather Conditions  During summers ozone is at highest levels  Increased sunlight  higher temperatures (> than 85o F).  During winter and wet and cool summers, ozone levels are greatly reduced.
  9. 9. Ozone & Human Health EffectsOzone & Human Health Effects  Ozone attacks lung tissue.Ozone attacks lung tissue.  Transcriptional Errors.Transcriptional Errors.  Skin cancersSkin cancers  AsthamaAsthama
  10. 10. Ground Level Ozone and PlantsGround Level Ozone and Plants  Causes foliar injury in plantsCauses foliar injury in plants  Reduces growthReduces growth  Reduces crop sizeReduces crop size
  11. 11. For Humans Ground Level Ozone Oxidizes Lung Tissue http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=50328  shortness of breath  chest pain when inhaling deeply  wheezing and coughing  inflammation of the lungs and airways  increased risk of asthma attacks
  12. 12. What is asthma?What is asthma?  Asthma is a chronic inflammatory disease ofAsthma is a chronic inflammatory disease of the airways that causes recurrent episodes ofthe airways that causes recurrent episodes of wheezing, breathlessness, chest tightness, andwheezing, breathlessness, chest tightness, and coughcough
  13. 13. Ground Level OzoneGround Level Ozone  Reduces growthReduces growth  Chronic exposureChronic exposure 40 - 80 ppb40 - 80 ppb  Acute exposureAcute exposure > 80 ppb> 80 ppb
  14. 14. Ozone Air Pollution is Harmful to Plants  Plants take carbon dioxide for photosynthesis.  When carbon dioxide enters stoma  Ozone damages cells
  15. 15. Open top field chambers to control ozone http://www.ars.usda.gov/main/docs.htm?docid=8453
  16. 16. Symptoms of Ozone Injury http://www.ars.usda.gov/main/docs.htm?docid=8453  Stipples (small darkly pigmented areas ~2-4 mm diameter)  Bronzing and reddening  Chlorosis  Necrosis
  17. 17. How To Identify Ozone InjuryHow To Identify Ozone Injury a)a) The typical symptom of ozone is an upper leaf surfaceThe typical symptom of ozone is an upper leaf surface interveinal stippleinterveinal stipple. Stipple is the discoloration of small. Stipple is the discoloration of small groups of cells between the veins, appearing as uniformlygroups of cells between the veins, appearing as uniformly sized red to brown spots.sized red to brown spots. Yellow poplar leaf with interveinal stipple http://www.fs.fed.us/r8/foresthealth/pubs/ozone/r8-pr25/jpg/fig4.jpg
  18. 18. Yellow Poplar ozone damage stippling and chlorosis http://www.forestryimages.org/images/768x512/1505026.jpg
  19. 19. I AM THANKFULL TO CORRESPONENT WHO GAVE ME THIS OPPURTUNITY AND ALSO FOR PRASAD SIR AND NALINI MAM WHO ENCOURAGED AND ME TO DO THIS PROJECT. MY SPECIAL THANKS WHO HELPED ME LOT AND FOR AUDIENCE FOR PATIENCE LISTINING
  20. 20. THANKING YOUTHANKING YOU

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