ozone

2. Ozone Layer
 An Introduction
 A thin layuer of O3
particles present in the
stratosphere.
 Having an altitude of
about 10 to 50 Kms.
 Absorb harmful UV-B
rays and prevents them
from entering the earth’s
atmosphere.

3. UV Rays
 Ultraviolet radiations are
electromagnetic waves emitted from
the Sun.
 UV radiation includes UV-A, the least
dangerous form of UV radiation, UV-
B, and UV-C, which is the most
dangerous.
 UV-C is unable to reach the Earth’s
surface due to stratospheric ozone’s
ability to absorb it.
 The real threat come from UV-B,
which can enter the Earth’s
atmosphere and has adverse effects.
 UV-B Rays can cause serious Skin
problems like ageing and cancer and
many others like depression of
immune system etc.

4. Depletion of the Ozone Layer
 Mainly caused by
increased
concentration of
chlorine in the
stratosphere.
 A large hole is formed
over Antarctica in the
Ozone Layer which
shows its continuous
depletion due to
CFCs, halogens etc.

5. Causes of Ozone Depletion
 The production and emission
of chlorofluorocarbons (CFCs),
is the leading cause of Ozone
layer depletion, CFCs accounts
for almost 80% of the total
depletion of ozone.
 Other ozone-depletion
substances (ODS), includes
hydro chlorofluorocarbons
(HCFCs), and volatile organic
compounds (VOCs)
 These are often found in
vehicle emissions, byproducts
of industrial processes,
refrigerants and aerosols.

6. Harmful Effects of the depletion of
Ozone
 On Nature
Crop Damage
Urban Pollution
 On Humans
Eye Defects and
cataract
Weakened Immune
System
Skin Cancer
Malnutrition

7. Protecting the Ozone Layer
 Always use certified
refrigerants in Car Acs, Repair
all the leaks, If any, in AC
systems.
 Stop using aersol sprays/ cans.
 Always purchase Acs and
refrigerators with non-ozone
depletion refrigerants and stop
using them if you use them at
present.
 Use/ buy more recycled
products.
 Always prefer to carpool or use
public transport

8. SAVE NATURE,
MAKE FUTURE!
Submitted By :-
Harmandeep Kaur
Roll No. 1433
B.Ed.