1. ByBy
MANUSHA.PMANUSHA.P

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. 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. Sydney chapmanSydney chapman

5. http://whyfiles.org/030air_pollution/images/nasaozone.gif

7. 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

8. http://harmanonearth.files.wordpress.com/2008/05/ground_ozone.jpg

9. 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.

10. Ozone & Human Health EffectsOzone & Human Health Effects
 Ozone attacks lung tissue.Ozone attacks lung tissue.
 Transcriptional Errors.Transcriptional Errors.
 Skin cancersSkin cancers
 AsthamaAsthama

11. 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

12. 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

13. 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

14. Ground Level OzoneGround Level Ozone
 Reduces growthReduces growth
 Chronic exposureChronic exposure 40 - 80 ppb40 - 80 ppb
 Acute exposureAcute exposure > 80 ppb> 80 ppb

15. Ozone Air Pollution is
Harmful to Plants
 Plants take carbon dioxide for photosynthesis.
 When carbon dioxide enters stoma
 Ozone damages cells

16. Open top field chambers to control ozone
http://www.ars.usda.gov/main/docs.htm?docid=8453

17. 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

18. 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

19. Yellow Poplar ozone damage stippling and chlorosis
http://www.forestryimages.org/images/768x512/1505026.jpg

20. 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

21. THANKING YOUTHANKING YOU