Your SlideShare is downloading. ×
0
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Ozone Depletion
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Ozone Depletion

9,048

Published on

Published in: Education, Technology
1 Comment
7 Likes
Statistics
Notes
  • great slide on ozone layer depletion....send me a copy
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total Views
9,048
On Slideshare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
478
Comments
1
Likes
7
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Ozone Depletion By Clarisse, Suleyman and Suzy
  • 2. Table of Content <ul><li>Defining Ozone Depletion </li></ul><ul><li>The Worst Effected Region </li></ul><ul><li>Main Causes </li></ul><ul><li>Why and How Ozone Depletion Happens </li></ul><ul><li>Consequences </li></ul><ul><li>Few Diagrams Explaining the Consequences </li></ul><ul><li>Suggested Solutions </li></ul>
  • 3. Defining Ozone Depletion <ul><li>Ozone Layer: </li></ul><ul><li>- protects the earth from ultraviolet rays </li></ul><ul><li>part of the earth’s atmosphere </li></ul><ul><li>contains high concentration of Ozone (O3) </li></ul><ul><li>concentration of O3 is small </li></ul><ul><li>important to life </li></ul>Ozone Depletion: - large hole in the protection of the earth (ozone) - observed loss of ozone (over 50 years) - mainly above the northern and southern poles - more ultraviolet rays hitting/affecting earth - Man made substances
  • 4. The Worst Hit Due to Ozone Depletion <ul><li>Where? </li></ul><ul><li>Antarctica (worst hit). </li></ul><ul><li>What? </li></ul><ul><li>Ozone layers have dropped to 33% since 1975 </li></ul><ul><li>Over 50% is destroyed </li></ul><ul><li>Great shock </li></ul><ul><li>Why/How? </li></ul><ul><li>Polar regions have larger variation in sunlight </li></ul><ul><li>Extremely low temperatures and Antarctic conditions </li></ul><ul><li>Cloud formation cause crystals </li></ul><ul><li>Crystals cause many reactions to occur </li></ul>
  • 5. Main Causes <ul><li>What? </li></ul><ul><li>Cosmic Rays </li></ul><ul><li>Sulphur put into the atmosphere </li></ul><ul><li>Stratospheric clouds together with Chlorine, Bromine and nitrogen oxides </li></ul><ul><li>Chlorofluorocarbons (CFC’s) </li></ul>Stratospheric clouds
  • 6. Why?How? <ul><li>Cosmic Rays: </li></ul><ul><li>Different types of rays </li></ul><ul><li>Rays react differently towards ozone </li></ul><ul><li>Not guaranteed as the cause </li></ul><ul><li>Sulphur: </li></ul><ul><li>Scientist still testing </li></ul><ul><li>Might not be the cause </li></ul><ul><li>Stratospheric Clouds: </li></ul><ul><li>Part of ozone layer </li></ul><ul><li>Support chemical reactions such as chlorine </li></ul><ul><li>Chlorine is a catalyst for ozone depletion </li></ul><ul><li>Stops the nitric acid from forming the cloud </li></ul><ul><li>Chlorofluorocarbons: </li></ul><ul><li>Compounds of chlorine, carbon and fluorine </li></ul><ul><li>Used as propellants </li></ul><ul><li>Unreactive </li></ul><ul><li>Remain in atmosphere for long time </li></ul>
  • 7. Consequences Leading to Health Concerns <ul><li>10% loss in ozone, becomes 26% increase in skin cancer e.g. malignant melanoma- (skin cancer) e.g.2 Basal and Squamous Cell Carcinomas (skin cancer) </li></ul><ul><li>Reduces resistance to disease </li></ul><ul><li>Reduction in food products- damage plant tissues + destroys crops </li></ul><ul><li>Increase in eye disorders + cataracts </li></ul><ul><li>Decrease in plankton </li></ul>
  • 8. A diagram of how ozone depletion affects the rest of our world.
  • 9. Important Solutions to Minimize Ozone Depletion <ul><li>Suggestions: </li></ul><ul><li>Use less chemicals, phase out pollution </li></ul><ul><li>Work together to reduce rate of depletion </li></ul><ul><li>Add ozone to stratosphere </li></ul><ul><li>Destroy CFC’s </li></ul>
  • 10. &nbsp;
  • 11. &nbsp;

×