ByBy

MANUSHA.PMANUSHA.P

INTRODUCTIONINTRODUCTION1)1) DefinitionDefinition2)2) DiscoveryDiscovery3)3) Types of ozoneTypes of ozone4)4) Effects on humans and plants. Effects on humans and plants. 5)5) Chemical equationChemical equation6)6) CausesCauses7)7) Measures to be takenMeasures to be taken

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

Sydney chapmanSydney chapman

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

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

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

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.

Ozone & Human Health EffectsOzone & Human Health Effects

Ozone attacks lung tissue.Ozone attacks lung tissue. Transcriptional Errors.Transcriptional Errors. Skin cancersSkin cancers AsthamaAsthama

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

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 

What is asthma?What is asthma?

Asthma is a chronic inflammatory disease of Asthma is a chronic inflammatory disease of the airways that causes recurrent episodes of the airways that causes recurrent episodes of wheezing, breathlessness, chest tightness, and wheezing, breathlessness, chest tightness, and cough cough

Ground Level OzoneGround Level Ozone

Reduces growthReduces growth Chronic exposure Chronic exposure 40 - 80 ppb40 - 80 ppb Acute exposure Acute exposure > 80 ppb> 80 ppb

Ozone Air Pollution is Harmful to Plants

Plants take carbon dioxide for photosynthesis. When carbon dioxide enters stoma Ozone damages cells

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

Symptoms of Ozone Injuryhttp://www.ars.usda.gov/main/docs.htm?docid=8453

Stipples (small darkly pigmented areas ~2-4 mm diameter) Bronzing and reddening Chlorosis Necrosis

How To Identify Ozone InjuryHow To Identify Ozone Injury

a)a) The typical symptom of ozone is an upper leaf surface The 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 uniformly groups 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

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

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

THANKING YOUTHANKING YOU