1.
Ozone Layer
Depletion
- By

2.
What is Ozone?
• Ozone is an elemental molecule with
formula O3.
• Ozone is a pale blue gas composed of
three oxygen atoms bonded together.
• Nearly 90% of Earth’s Ozone is in the
Stratosphere known as Ozone layer.
• It protects Earth’s surface from harmful
Ultraviolet rays.
• It is harmful at ground level.

3.
Importance of Ozone
Layer
Ozone layer plays a vital role in
the protection of all living beings. The
sun propagates ultraviolet radiations
which as an adverse effect on living
beings. This layer absorbs the
radiations and prohibits them from
entering the outer surface of the earth.

4.
Ozone Layer Depletion
• Ozone layer depletion is the gradual thinning
of the earth’s ozone layer in the upper
atmosphere.
• It is caused due to the release of chemical
compounds from industries or other human
activities.
• These are basically called ODS that stands
for Ozone-Depleting Substance.
• These ozone depletion substances float and
then reach the stratosphere.
• They are capable of breaking down the
molecules of the ozone layer.
• Therefore, it results in the depletion of the
ozone layer.

5.
Causes of Ozone Depletion
MAN-MADE CAUSES:
• Chlorofluorocarbons (CFCs)
• Halons
• Methyl chloroform(CH3CCl3)
• Hydro-chlorofluorocarbons(HCFCs)
• Methyl Bromide
NATURAL CAUSES:
• Sun-spots
• Stratospheric Winds
• Volcanic Eruptions

6.
Impacts of Ozone Depletion
Effects on Humans and animals
Humans and animals will be directly exposed to the harmful
ultraviolet radiation of the sun which might result in serious
health issues among humans, such as skin diseases, cancer,
sunburns, etc. and among animals, such as skin and eye
cancer.
Effects on the Environment
Strong ultraviolet rays may lead to minimal growth, flowering
and photosynthesis in plants. The forests also have to bear
the harmful effects of the ultraviolet rays.
Effects on Marine Life
Planktons are greatly affected by the exposure to harmful
ultraviolet rays. These are higher in the aquatic food chain. If
the planktons are destroyed, the organisms present in the
food chain are also affected.

7.
Preventive Measures
• Avoid using ODS by replacing CFCs in
refrigerators and air conditioners.
• Minimize the Use of Vehicles.
• Use Eco-friendly Cleaning Products.
• Prohibiting use of Nitrous Oxide.
• Buy local products.

8.
Conclusion
There is no doubt that the problem of
ozone depletion exists and deserves
extensive research and attention. With the
release of each CFC, our ozone layer takes
one small step towards its destruction. The
entire world must unite in order to expel this
problem forever.

9.
Thank you