• Save
Sec 2 NA Ozone Depletion
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
No Downloads

Views

Total Views
4,004
On Slideshare
3,640
From Embeds
364
Number of Embeds
6

Actions

Shares
Downloads
0
Comments
1
Likes
5

Embeds 364

http://2na-geo.blogspot.sg 192
http://2na-geo.blogspot.com 167
http://www.slideshare.net 2
http://2na-geo.blogspot.ca 1
http://chua-geography.blogspot.sg 1
http://2na-geo.blogspot.hk 1

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