Ozone Depletion
What is ozone depletion? <ul><li>The gradual destruction of the ozone layer caused mainly by the release of chlorofluoroca...
Purpose of ozone layer <ul><li>Act as a shield around the Earth </li></ul><ul><li>Protecting life on Earth from harmful ul...
 
Cause of ozone depletion <ul><li>CFCs have been identified as the main cause of damage to the ozone layer. </li></ul><ul><...
Sources of CFCs <ul><li>Aerosol spray </li></ul>
Sources of CFCs <ul><li>Coolants in refrigerators  </li></ul>
Sources of CFCs <ul><li>Styrofoam  </li></ul>
 
Consequences of ozone depletion <ul><li>Impact on animals and plants </li></ul><ul><ul><li>Damage plant tissues and destro...
 
Consequences of ozone depletion <ul><li>Impact on people </li></ul><ul><ul><li>Too much exposure to UV rays can cause dise...
Solution?
Measure to reduce ozone depletion <ul><li>Sign international agreement to cut down usage of CFCs  </li></ul><ul><ul><li>Mo...
Individual effort <ul><li>Use / buy more recycled products </li></ul><ul><li>Save energy </li></ul><ul><li>Take public tra...
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Sec 2 NA Ozone Depletion

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Sec 2 NA Ozone Depletion

  1. 1. Ozone Depletion
  2. 2. What is ozone depletion? <ul><li>The gradual destruction of the ozone layer caused mainly by the release of chlorofluorocarbons (CFCs) into the atmosphere. </li></ul>
  3. 3. Purpose of ozone layer <ul><li>Act as a shield around the Earth </li></ul><ul><li>Protecting life on Earth from harmful ultraviolet (UV) rays of the Sun </li></ul>
  4. 5. Cause of ozone depletion <ul><li>CFCs have been identified as the main cause of damage to the ozone layer. </li></ul><ul><li>Chlorine contained in the CFCs are destroying the ozone molecules in the ozone layer. </li></ul>
  5. 6. Sources of CFCs <ul><li>Aerosol spray </li></ul>
  6. 7. Sources of CFCs <ul><li>Coolants in refrigerators </li></ul>
  7. 8. Sources of CFCs <ul><li>Styrofoam </li></ul>
  8. 10. Consequences of ozone depletion <ul><li>Impact on animals and plants </li></ul><ul><ul><li>Damage plant tissues and destroy crops, resulting in decline in food supply. </li></ul></ul><ul><ul><ul><li>Leading to famine </li></ul></ul></ul><ul><ul><li>UV rays kill plankton which food for many marine animals </li></ul></ul><ul><ul><ul><li>Destruction of food chain and web </li></ul></ul></ul><ul><ul><ul><li>Extinction of species </li></ul></ul></ul>
  9. 12. Consequences of ozone depletion <ul><li>Impact on people </li></ul><ul><ul><li>Too much exposure to UV rays can cause disease like cataract and skin cancer </li></ul></ul><ul><ul><li>Weaken our immune system making us less resistant to diseases </li></ul></ul>
  10. 13. Solution?
  11. 14. Measure to reduce ozone depletion <ul><li>Sign international agreement to cut down usage of CFCs </li></ul><ul><ul><li>Montreal protocol </li></ul></ul><ul><ul><li>Kyoto protocol (reduce greenhouse gases) </li></ul></ul><ul><li>Reducing usage of CFCs products </li></ul><ul><ul><li>Stop buying products containing CFCs </li></ul></ul><ul><ul><li>Disposal coolant in fridge & air con properly </li></ul></ul>
  12. 15. Individual effort <ul><li>Use / buy more recycled products </li></ul><ul><li>Save energy </li></ul><ul><li>Take public transport </li></ul>

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