Ozone Depletion
The ozone layer is a protective
shield of ozone [02] in the upper
area of the atmosphere.
Ozone Layer
What is ozone
depletion?
• There used to be
much more ozone
in the
stratosphere
• This thinning of
the ozone layer is
called ozone
depletion
Explain the human actions
that may have caused this
problem.
• Widespread use of chemicals that
thin the ozone such as CFCs are
responsible for the thinning ozone
• CFCs were first used as refrigerants
,cleaning fluids , and air
conditioners
• Other CFC carrying products are
shaving creams, hairsprays,
deodorants, paints, and insecticides
packaged in spray cans.
How does this problem
negatively affect humans?
Cancerous moles
• Increased UV
radiation that
can cause skin
cancer and
cataracts
• Exposure to too
much UV rays
can cause
sunburn of the
cornea
How does ozone depletion
negative affect surrounding
ecosystems?
• Increased UV radiation reaching
the earth’s surface from ozone
depletion in the stratosphere
harms crops, forests, animals,
and other materials.
How does ozone depletion
negative affect surrounding
ecosystems? (cont.)
Crops
destroyed by
UV rays
What could happen in the future
if this problem is not fixed?
• If this problem is not fixed there
could be severe damage to
peoples health, crops, and other
animals.
Explain positive actions that
people can do or have done to
reduce the problem.
• Canada banned the use of CFCs
• Avoid installing CFC-dependant
ari conditioning systems
Why leave the problem?
• The increased number UV ray
also boosts the ammount of
vitamin D
• Vitamin D is important in the
maintenance of organ systems